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Journal articles on the topic 'Palaeobotany'
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1
Yang, Wen, Sherong Hu, and Shimin Ma. "The relationship of paleontology, palaeobotany and coal thickness of Taiyuan Formation, Late Carboniferous – Early Permian in Shanxi Province." World Journal of Engineering 14, no. 2 (April 10, 2017): 139–44. http://dx.doi.org/10.1108/wje-06-2016-0016.
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Purpose The purpose of this paper is to find the relationship of palaeontology, palaeobotany and coal thickness of Taiyuan Formation during Late Carboniferous – Early Permian Period in Shanxi Province. Design/methodology/approach This paper selects three regions, namely, Baode, Xishan and Lingchuan, to analyse the distribution characteristics of palaeontology, palaeobotany and variation of coal thickness. Findings It was found that in a certain period of geological history, palaeontology and palaeobotany play a dominant role in shaping of a coal-bearing basin. Coal seam thickness changes largely from the northwest to the southeast, gradually thinning in Taiyuan Formation. Originality/value Palaeontology and palaeobotany play a dominant role in the shaping of a coal-bearing basin.
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Matten, Lawrence C., and Sergei V. Meyen. "Fundamentals of Palaeobotany." Bulletin of the Torrey Botanical Club 117, no. 1 (January 1990): 66. http://dx.doi.org/10.2307/2997133.
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Shute, Cedric H., and Christopher J. Cleal. "Palaeobotany in Museums." Geological Curator 4, no. 9 (November 1987): 553–59. http://dx.doi.org/10.55468/gc865.
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Museums, whether national or local, have a variety of roles and thus have diverse and sometimes conflicting pressure put on their resources. For many local museums, the provision of public displays is their most important role (Waterston 1979), since either directly or indirectly (e.g. the spin-offs of tourism) this is for the immediate benefit of their main paymaster, the ratepayer. As was cogently argued by Waterston, however, they can have another important role, which is to store specimens for academic research (see also Bassett 1979). Such material may have a national or even international importance and may thus have a greater long-term significance than the public displays.
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Schmid, Rudolf, W. G. Chaloner, and S. V. Meyen. "Fundamentals of Palaeobotany." Taxon 37, no. 1 (February 1988): 204. http://dx.doi.org/10.2307/1220967.
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Köhler, Piotr. "Władysław Szafer as a palaeobotanist." Studia Historiae Scientiarum 20 (September 13, 2021): 191–212. http://dx.doi.org/10.4467/2543702xshs.21.007.14038.
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Władysław Szafer (1886–1970) was one of the notable Polish botanists of the first half of the 20th c., palaeobotany being one of his main fields of interest, cultivated for over 60 years. Initially, he studied Quaternary floras and later on he expanded his interests to the Tertiary (Neogene) floras at the end of the 1930s. He published at least 80 different books and papers on palaeobotany, many of which still having scientific, not only historical, value. His organizational, teaching and editing activities in the field of palaeobotany were also remarkable, and influenced strongly the science in Poland. He contributed to the fast development of this field of knowledge in Poland, both in terms of research and in terms of staff number. 50 years after his death, we summarize the results of Władysław Szafer’s activity in palaeobotany.
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Tiwari, R. S. "Thrust Areas in Palaeobotany." Journal of Palaeosciences 42, no. 1-3 (December 31, 1993): 98. http://dx.doi.org/10.54991/jop.1993.1137.
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Thomas, Barry A., and S. V. Meyen. "Palaeobotany: Information and Inspiration." Journal of Biogeography 16, no. 4 (July 1989): 399. http://dx.doi.org/10.2307/2845234.
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Guleria, J. S. "A brief account of Cenozoic (Tertiary) flora of India: its development, significance and future considerations." Journal of Palaeosciences 57, no. (1-3) (December 31, 2008): 317–22. http://dx.doi.org/10.54991/jop.2008.250.
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The paper is based on megafossil records of which the angiosperms provide the bulk of data and are represented by various plant parts such as roots, woods, leaves, fruits, flowers, etc. The modern flora of India is one of the richest and diverse floras of the world. The roots of extant flora of India can be traced back to base of the Palaeocene or just below the K/Pg boundary. The development or history of primarily Cenozoic flora in India can be divided into three periods, viz., (i) Pre-Sahni Period (1782-1920), (ii) Prof. Sahni's Period (1920-1949) and (iii) Post-Sahni Period (1950 onwards). The first period can be called as the age of colonial or pioneer explorers. It was a period when Cenozoic plant fossils were largely collected as curios and were purely viewed with a geological bias. The second period was the most momentous period in the history of Indian Palaeobotany in general and Cenozoic Palaeobotany in particular. It began with the return of Prof. Birbal Sahni in 1920 from Cambridge, when he took stock of the existing position of Palaeobotany in India and eventually laid the foundation of Indian Palaeobotany. During the third period, Indian Palaeobotany made far reaching progress in all spheres. A large amount of data was accumulated and synthesized for the proper evaluation of the Cenozoic flora. However, many problems are still to be tackled and neglected aspects of the flora need to be looked into to get fuller picture of the Cenozoic flora.
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Collinson, Margaret. "Palaeobotany: On follicles and flowers." Nature 319, no. 6056 (February 1986): 723–24. http://dx.doi.org/10.1038/319723a0.
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Falcon-Lang, Howard. "Marie Stopes: passionate about palaeobotany." Geology Today 24, no. 4 (July 2008): 132–36. http://dx.doi.org/10.1111/j.1365-2451.2008.00675.x.
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Hernandez-Castillo, Genaro R., and Ruth A. Stockey. "Palaeobotany of the Bunya Pine." Queensland Review 9, no. 2 (November 2002): 25–30. http://dx.doi.org/10.1017/s1321816600002920.
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The bunya pine (Araucaria bidwillii Hook) is one of the most interesting species of the family Araucariaceae, a typical Southern Hemisphere conifer (Table 1) family that includes three living genera: Araucaria de Jussieu, Agathis Salisbury and the recently described genus Wollemia Jones, Hill and Allen. Araucaria bidwillii is traditionally classified in the Section Bunya of genus Araucaria. In addition to the section Bunya, there are three more sections in the genus Araucaria: Eutacta Endlicher and Intermedia White from Australasia, and Araucaria (=Columbea) Wilde and Eames from South America.
12
Lemoigne, Yves. "Palaeozoic palaeobotany of great Britain." Geobios 28, no. 4 (January 1995): 526. http://dx.doi.org/10.1016/s0016-6995(95)80031-x.
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Bowden, A. J., C. V. Burek, and R. Wilding. "History of Palaeobotany: an Introduction." Geological Society, London, Special Publications 241, no. 1 (2005): 1–3. http://dx.doi.org/10.1144/gsl.sp.2003.207.01.01.
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Bateman, Richard M. "Fact and theory in palaeobotany." Trends in Ecology & Evolution 9, no. 1 (January 1994): 33–34. http://dx.doi.org/10.1016/0169-5347(94)90235-6.
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Anderson, L. I., and M. A. Taylor. "Charles W. Peach, palaeobotany and Scotland." Geological Curator 8, no. 9 (October 2008): 393–425. http://dx.doi.org/10.55468/gc395.
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The move south from Wick to the city of Edinburgh in 1865, some four years after retirement from the Customs service, provided Charles W. Peach with new opportunities for fossil-collecting and scientific networking. Here he renewed and maintained his interest in natural history and made significant palaeobotanical collections from the Carboniferous of the Midland Valley of Scotland. These are distinguished by some interesting characteristics of their documentation which the following generations of fossil collectors and researchers would have done well to emulate. Many of his fossil plant specimens have not only the locality detail, but also the date, month and year of collection neatly handwritten on attached paper labels; as a result, we can follow Peach's collecting activities over a period of some 18 years or so. Comments and even illustrative sketches on the labels of some fossils give us first-hand insight into Peach's observations. Study of these collections now held in National Museums Scotland reveals a pattern of collecting heavily biased towards those localities readily accessible from the newly expanding railways which provided a relatively inexpensive and convenient means of exploring the geology of the neighbourhood of Edinburgh. Charles W. Peach had a very 'hands-on' practical approach to scientific investigation which led him to construct novel glass plates with mounted Sphenopteris cuticle, removed intact from Lower Carboniferous shales and limestones originating in West Lothian. These resemble the herbarium sheets with which he was familiar from his parallel and highly significant work on extant flora including nearshore marine algae. He also prepared hand-ground glass microscope slides, particularly of permineralised plant material from Pettycur in Fife, using whatever materials he had to hand at the time. Peach's collection raises questions about the evolution of accepted standards of documentation in private collections, in parallel with the evolution of collecting practices by the new professionals such as the workers of the Geological Survey. Its relatively rapid deposition in museums, compared to many private collections, may also have contributed to its apparently high rate of usage by contemporary workers.
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Maheshwari, H. K. "Fundamentals of Palaeobotany by S.V.Meyen 1987." Journal of Palaeosciences 35, no. (1-3) (December 31, 1986): 363. http://dx.doi.org/10.54991/jop.1986.1551.
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Friis, Else Marie. "Systematic and taxonomic approaches in palaeobotany." Nordic Journal of Botany 8, no. 2 (April 1988): 138. http://dx.doi.org/10.1111/j.1756-1051.1988.tb00492.x.
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Van Zeist, Wilhem, and Willemina Waterbolk-Van-Rooijen. "The Palaeobotany of Tell Bouqras, Eastern Syria." Paléorient 11, no. 2 (1985): 131–47. http://dx.doi.org/10.3406/paleo.1985.4371.
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Kealhofer, Lisa, and Dolores R. Piperno. "Early agriculture in southeast Asia: phytolith evidence from the Bang Pakong Valley, Thailand." Antiquity 68, no. 260 (September 1994): 564–72. http://dx.doi.org/10.1017/s0003598x00047050.
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Phytoliths — the microscopic opal silica bodies inside plant tissue that often survive well in archaeological deposits— are becoming a larger part of the world of human palaeobotany. They give a new view of early rice in southeast Asia.
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Popa, Mihai E. "Aspects of Romanian Early Jurassic palaeobotany and palynology." Review of Palaeobotany and Palynology 111, no. 1-2 (August 2000): 31–47. http://dx.doi.org/10.1016/s0034-6667(00)00014-2.
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van Konijnenburg-van Cittert, Johanna H. V. "Bibliography of European palaeobotany and palynology, 1994–1995." Review of Palaeobotany and Palynology 99, no. 3-4 (March 1998): 341. http://dx.doi.org/10.1016/s0034-6667(97)00032-8.
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Krassilov, Valentin A. "Palaeobotany of the mesophyticum: state of the art." Review of Palaeobotany and Palynology 50, no. 3 (February 1987): 231–54. http://dx.doi.org/10.1016/0034-6667(87)90002-9.
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Yamada, Toshihiro, and Harufumi Nishida. "Palaeobotany: Old but new stories on plant diversity." Journal of Plant Research 127, no. 2 (January 10, 2014): 185–86. http://dx.doi.org/10.1007/s10265-013-0620-0.
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Anderson, Lyall I. "Hugh Miller: introducing palaeobotany to a wider audience." Geological Society, London, Special Publications 241, no. 1 (2005): 63–84. http://dx.doi.org/10.1144/gsl.sp.2003.207.01.06.
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Berry, Christopher M. "Palaeobotany: The Rise of the Earth’s Early Forests." Current Biology 29, no. 16 (August 2019): R792—R794. http://dx.doi.org/10.1016/j.cub.2019.07.016.
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Jansonius, Jan. "Bibliography of European palaeobotany and palynology 1990–1991." Review of Palaeobotany and Palynology 78, no. 3-4 (September 1993): 403–4. http://dx.doi.org/10.1016/0034-6667(93)90074-5.
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Sharma, Manju. "New Biology towards Socio-economic Progress." Journal of Palaeosciences 50, no. (1-3) (December 31, 2001): 161–65. http://dx.doi.org/10.54991/jop.2001.1820.
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Prof. Birbal Sahni, the founder Director of the Birbal Sahni Institute of Palaeobotany paved the way for systematic developments in this field from botanical and geological aspects. Palaeobotany is the study of ancient life. The Indian sub-continent is bestowed with enormous biodiversity and richness of biological resources. The grave consequence of loss of biological diversity has to be understood on scientific basis. The global biological heritage, both for the present and for the future will have a proven influence on the potential of constructing a sustainable agriculture and forestry system which will produce useful products for the sustenance of human life. The work in new biology and the advent of biotechnology and genetic engineering have given a large number of fundamentals, innovations, tools and techniques. The scientists can produce crops with desired traits, enhance the food productivity and nutritional status of the crops, produce new vaccines and diagnostics, develop packages for environmental restoration and protection of biodiversity. The future advances in new biology offer enormous potential both for economic and societal development.
Keywords- Biology, Technology, Genome, Biodiversity, Protein.
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Venkatachala, B. S. "Symposium on Four Decades of Indian Palaeobotany: an introduction." Journal of Palaeosciences 40 (December 31, 1991): 1–7. http://dx.doi.org/10.54991/jop.1991.1765.
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Lakhanpal, R. N. "From the Archives: An historical outline of Indian Palaeobotany." Journal of Palaeosciences 51, no. (1-3) (December 31, 2002): 181–82. http://dx.doi.org/10.54991/jop.2002.1748.
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Sun, Qi-Gao. "The rise of Chinese palaeobotany, emphasizing the global context." Geological Society, London, Special Publications 241, no. 1 (2005): 293–98. http://dx.doi.org/10.1144/gsl.sp.2003.207.01.19.
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Burnham, Robyn J., and Kirk R. Johnson. "South American palaeobotany and the origins of neotropical rainforests." Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 359, no. 1450 (October 29, 2004): 1595–610. http://dx.doi.org/10.1098/rstb.2004.1531.
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Extant neotropical rainforest biomes are characterized by a high diversity and abundance of angiosperm trees and vines, high proportions of entire–margined leaves, high proportions of large leaves (larger than 4500 mm 2 ), high abundance of drip tips and a suite of characteristic dominant families: Sapotaceae, Lauraceae, Leguminosae (Fabaceae), Melastomataceae and Palmae (Arecaceae). Our aim is to define parameters of extant rainforests that will allow their recognition in the fossil record of South America and to evaluate all known South American plant fossil assemblages for first evidence and continued presence of those parameters. We ask when did these critical rainforest characters arise? When did vegetative parameters reach the level of abundance that we see in neotropical forests? Also, when do specific lineages become common in neotropical forests? Our review indicates that evidence of neotropical rainforest is exceedingly rare and equivocal before the Palaeocene. Even in the Palaeocene, the only evidence for tropical rainforest in South America is the appearance of moderately high pollen diversity. By contrast, North American sites provide evidence that rainforest leaf physiognomy was established early in the Palaeocene. By the Eocene in South America, several lines of evidence suggest that neotropical rainforests were diverse, physiognomically recognizable as rainforest and taxonomically allied to modern neotropical rainforests. A mismatch of evidence regarding the age of origin between sites of palaeobotanical high diversity and sites of predicted tropical climates should be reconciled with intensified collecting efforts in South America. We identify several lines of promising research that will help to coalesce previously disparate approaches to the origin, longevity and maintenance of high diversity floras of South America.
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Golovneva, L. B., and P. I. Alekseev. "The genus Trochodendroides Berry in the cretaceous floras of Siberia." Palaeobotany 1 (2010): 120–66. http://dx.doi.org/10.31111/palaeobotany/2010.1.120.
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Seventeen species of the genus Trochodendroides and one species of the genus Nyssidium are described from the Albian-Maastrichtian deposits of the Chulym-Yenisei depression (Western Siberia), Lena-Vilyui depression (Eastern Siberia) and Kolyma River basin. The study of recently collected materials and revision of previous data allow us to describe 4 new species (T. buorensis Golovn., sp. nov, T. beketovii Golovn., sp. nov., T. rostrata Golovn. et P. Alekseev, sp. nov.) and to offer 6 new combinations (T. tiungensis (Budants.) Golovn., comb. nov., T. heterophylla (Budants.) Golovn., comb. nov., T. kemensis (Ananjev) Golovn., comb. nov., T. sibirica (Tcherepnin) P. Alekseev, comb. nov., T. bajkovskae (I. Lebed.) Golovn., comb. nov., T. gromovii (E. Lebed.) Golovn., comb. nov). The new names were proposed for two species (T. budantsevii Golovn., nom. nov., T. ananjevii Golovn., nom. nov.). The morphological diversity, variability and value of different characters for distinction of species are discussed. The epidermal features were firstly examined for T. heterophylla and T. ananjevii. They are mostly similar to epidermal features of Cercidiphyllum. The genus Trochendroides firstly appeared in Siberia in the early-middle Albian as a minor component of the conifer-dominated Mesophytic floras. The determination of this genus is verified by the findings of Nyssidium fruits. During the Late Cretaceous the genus Trochodendroides was common member in floras of the Siberian-Canadian phythogeographic region. The systematic and morphology diversity of Trochodendroides was comparatively low in the late Albian–Cenomanian and the findings of these leaves are rare. The abundance of Trochodendroides leaves was increased in the Turonian and the Coniacian. During the Coniacian this genus reached the highest systematic and morphologic diversity (the Antibes and the Vilyui floras). In the Santonian-Campanian the abundance of Trochodendroides leaves was decreasing again. In this time the lanceolate or narrow-ovate leaf morphotypes were most usual. They were often described as Macclintockia, Zizyphus or Paliurus. Genus Trochodendroides is not presented in the Cretaceous deposits of Europe and firstly appeared there in the Tertiary. This genus is rare in the Late Cretaceous deposits of the Turan province, near the boundary between Siberian-Canadian and Euro-Sinian phythogeographic regions.
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Nosova, N. V. "The genus Leptotoma Kiritch. et Samyl. (Ginkgoales): systematics and characteristics of the leaf epidermal structure." Palaeobotany 1 (2010): 2–44. http://dx.doi.org/10.31111/palaeobotany/2010.1.22.
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Diagnostic features are systematized for the leaf epidermal structure of the Leptotoma Kiritch. et Samyl. The study of the new findings and the revision of the type material of L. kryshtofovichii Srebrod. et Samyl. from the Early Cretaceous of Eastern Transbaikalia reveal the occurrence of occasional stomata on the lateral epidermis as well as the presence of a central or proximal papilla on the subsidiary cells of the stomata, which allows to emend the specific diagnosis. The same sediments yield L. baikalica N. Nosova, sp. nov., that differs considerably from other Leptotoma species in its peculiar set of epidermal characters. For the first time, discrete resin ducts are found in the leaves of Leptotoma. The revision of type specimens of L. tenuis Samyl. and L. prynadae Travina from the Middle Jurassic of Kansk-Achinsk Coal Basin (Krasnoyarsk kray) suggests their affinity to Baiera. The re-investigation of the type material of L. borealis Travina and L. sibirica Kiritch. et Batjaeva from the Jurassic of Western Siberia indicates that these species should be merged, with L. sibirica kept as the priority name. For the first time for the Lower Cretaceous, findings of Leptotoma leaves are reported from the Maastrichtian of the Amur oblast (L. samylinae N. Nosova, sp. nov.).
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Shczepetov, S. V., and L. B. Golovneva. "The late cretaceous flora from volcanogenic deposits of northern Priokhotie (The Okhotsk-Chukotka volcanogenic belt)." Palaeobotany 1 (2010): 45–95. http://dx.doi.org/10.31111/palaeobotany/2010.1.45.
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Assemblage of fossil plants from the Gydra, Yum and Kananyga Formations (the Villigha and Toomahni Rivers interfluve, Okhotsk-Chukotka volcanogenic belt) are joined in the Aleeki flora. The systematic description of main species is given and floristic and phytostratigraphical analysis of this flora is carried out. New species Lobifolia alikensis Golovn. et Shczep. is described. The Aleeki flora is typical flora of the Okhotsk-Chukotka volcanogenic belt. It contain few angiosperms and significant amount relic elements among ferns (Hausmannia, Lobifolia), cycadophytes (Heilungia), czekanowskiales (Phoenicopsis) and ginkgoales (Sphenobaiera, Ginkgo ex gr. sibirica). In consequence of its stratigraphical position the Aliky flora is slightly younger than the Chingandzha flora (the Turonian-Coniacian) and it is compositionally similar with the Chaun flora (Coniacian). On this basis the age of the Aleeki flora is estimated as the Coniacian. The common taxa of the Aleeki and Chingandzha floras are Coniopteris tschuktschorum, Asplenium dicksonianum, Cladophlebis inaequipinnulata, Birisia sp., Ginkgo ex gr. adiantoides, G. ex gr. sibirica, Sequoia, Metasequoia, Menispermites, Dalembia and Trochodendroides. The common genera of the Aleeki and Chaun floras are Coniopteris, Asplenium, Arctopteris, Cladophlebis, Ginkgo, Sphenobaiera, Heilungia, Phoenicopsis, Picea, Sequoia, Metasequoia, Menispermites, Dalembia and Trochodendroides. Besides that the Aleeki flora contains some species, which were believed as endemic of the Chaun flora: Tchaunia lobifolia, Cladophlebis grandis and Araucarites subacutensis. The Aleeki and Chaun floras are now considered as contemporaneous regional floras, which were distributed in the northern part of the Okhotsk-Chukotka volcanogenic belt.
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Gomankov, A. V. "Conifers from the Permian of the Cargala mines (Southern Foreurals)." Palaeobotany 1 (2010): 5–21. http://dx.doi.org/10.31111/palaeobotany/2010.1.5.
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Impressions and compressions of conifers from the Cupriferous Sandstones Formation of the Kazanian – Tatarian age are described. The repeated association of Sashinia female cones with Quadrocladus vegetative shoots suggests the relation of these types of organs in their lifetime. The position of Sashinia in the general evolutionary picture of female cones of early conifers allows the establishment of a new family, Sashiniaceae Gomankov, fam. nov. Sashinia antiqua Gomankov, sp. nov. and Quadrocladus antiquus Gomankov, sp. nov. are described. Besides, the vegetative shoots of Geinitzia as well as those of Steirophyllum biarmicum (Eichwald) Gomankov were found. The latter shoots despite demonstrating conifer-like morphology still belong to cordaites, while the supposed presence of cordaite fructifications in the flora of Kargala Mines is not confirmed.
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Golovneva, L. B., and S. V. Shchepetov. "Stratigraphy of the Maastrichtian deposits of the Kakanaut rive basin (Eastern part of Koryak Upland)." Palaeobotany 1 (2010): 96–119. http://dx.doi.org/10.31111/palaeobotany/2010.1.96.
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Recent discovery of rich dinosaur fauna at high latitudes in northeastern Russia required the additional investigation of the Kakanaut locality for more precise definition of its age and stratigraphic position. This locality is situated in the southern part of the Koryak Upland, in the Kakanaut River basin near Pekulneyskoe Lake (Chukotka Autonomous Region). In the result of field work 2007-2009, five particular sections were described and joint geological column of the Maastrichtian deposits was composed. In this column three parts were distinguished: the marine siltstone strata, the Kakanaut Formation and the Kokuy strata. The Maastrichtian deposits are covered by effusive-pyroclastic deposits (possibly, early Paleogene in age). The marine siltstone strata contains inocerams and ammonites of the lower and lower part of upper Maastrichtian (Inoceramus (Cataceramus) pilvoensis Sok., Schachmaticeramus shikotanensis (Nagao et Mat.) Schachmaticeramus kusiroensis (Nagao et Mat.). Hypophylloceras marshalli (Shimizu), Diplomoceras sp., Pachydiscus subcompressus Mat.). The Kokuy strata contains remains of the late Maastrichtian-early Palaeocene foraminifers (Rzehakina epigone zone) and of undetermined fragments of ammonites. The Kakanaut Formation are represented by nonmarine volcanogenous-terrigenous sediments. It consists of tuffaceous sandstone and siltstones, tuffs, tuffites and andesite-basaltic rocks and represents lacustrine and fluviodeltaic deposition on near-sea lowland. These deposits contain joint association of fossil plants and dinosaur bones, teeth and eggshell fragments. The dinosaur assemblage represented by basal ornithopods, hadrosaurids, ankylosaurians, neoceratopsians, troodontids, dromaeosaurids and tyrannosaurids. Dinosaur eggshell fragments, belonging to hadrosaurids and non-avian theropods, indicate that at least several dinosaur taxa could reproduce in polar region. The Kakanaut flora includes about 50 taxa. The cycadophytes (Nilssonia, Encephalartopsis) and Ginkgo are very abundant in certain layers. The conifers are represented by mixture of the typical Late Cretaceous elements with an admixture of younger Paleocene elements belonging to families Taxodiaceae, Cupressaceae and Pinaceae. Angiosperms include about 30 species. Families that can be confidently recognized are Platanaceae (Platanus), Cercidiphyllaceae (Trochodendroides), Betulaceae (Corylus), Fagaceae (Fagopsiphyllum), Rosaceae (Peculnea, Arctoterum). Other species appear to belong to ancient groups, without clear phylogenetic links to modern taxa. The age of the fossiliferous beds can be estimated as the beginning of late Maastrichtian. The correlation of the Maastrichtian deposits of different areas at eastern part of Koryak Upland was carried out.
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Golovneva, L. B., and S. V. Shczepetov. "The late cretaceous flora from volcanogenic deposits of Northern Priokhotie (The Okhotsk-Chukotka volcanogenic belt)." Palaeobotany 2 (2011): 100–113. http://dx.doi.org/10.31111/palaeobotany/2011.2.100.
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The Karamken floristic assemblage occurs from basal layers of the Kholchan Formation of the Okchotsk-Chukotka volcanogenic belt (OCVB). The locality is situated at Khasyn River near Karamken settlement. The Karamken assemblage is composed of 6 taxa: Heilungia sp., Phoenicopsis ex gr. angustifolia Heer, Sphenobaiera sp., Metasequoia sp., Taxodium amguemensis (Efimova) Golovn., Trochodendroides sp. This flora is distinct from more ancient Arman flora and younger Ola flora. According to systematic composition the Karamken floristic assemblage is similar to the Chaun flora of Central Chukotka (the Coniacian), to the Aleeki flora from the Villigha and Toomahni Rivers interfluve (the Coniacian) and to the floristic assemblage from the Leurvaam (?) Formation of Eastern Chukotka (Efimova, 1966). On this basis the age of the Karamken flora is estimated as the Coniacian. Association of the remains of Metasequoia, Taxodium amguemensis, Phoenicopsis and large leaves of Sphenobaiera is repeated in different localities in different part of the OCVB. These remains are usually connected with fine-grained volcanogenic-terrigenous paludal-lacustrine deposits.
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Nosova, N. V., and A. I. Kiritchkova. "New species of Phoenicopsis Heer (Czekanowskiales) from the Jurassic of Mangyshlak (Kazakhstan)." Palaeobotany 2 (2011): 114–26. http://dx.doi.org/10.31111/palaeobotany/2011.2.114.
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Leaf fragments with an epidermal structure confidently suggesting their affinity to the genus Phoenicopsis Heer (Czekanowskiales) have been discovered for the first time in the Jurassic of Mangyshlak (Kazakhstan). Representatives of this genus were previously identified n this flora based on the morphological characters of the leaf compressions only. Two new species of the subgenus Phoenicopsis are described, P. insolita N. Nosova et Kiritch., sp. nov. and P. sauranica N. Nosova et Kiritch., sp. nov., as well as a species of the subgenus Culgoweria, P. tanynbaica N. Nosova et Kiritch., sp. nov. The stomatal topography of P. kilpperiana (Schweitzer et Kirchner) Kiritch. has been re-examined in greater detail on the basis of the available type material from the Early Jurassic of Iran.
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Golovneva, L. B. "Genus Ettingshausenia (Platanaceae) in the Cenomanian-Turonian floras of Eurasia." Palaeobotany 2 (2011): 127–63. http://dx.doi.org/10.31111/palaeobotany/2011.2.127.
Full textAbstract:
Rhomboid platanaceous leaves from the Cenomanian-Turonian deposits of Rurasia are revised. The most part of findings are referred to Ettingshausenia cuneifolia (Bronn) Stiehler. Emended diagnosis of the genus Ettingshausenia and detailed morphological and epidermal characteristics of E. cuneifolia are given. It is proposed to consider genus Ettingshausenia as a natural extinct genus of Platanaceae family.
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Nikitin, V. P., and A. V. Hvalj. "Azolla reproductive structures in the Cenozoic of West Siberia." Palaeobotany 2 (2011): 5–90. http://dx.doi.org/10.31111/palaeobotany/2011.2.5.
Full textAbstract:
Reproductive structures (megaspore complexes and partly massulae) of 22 species of Azolla Lamarck (Azollaceae, Salviniales, Pteridophyta) are recorded from the Eocene–Holocene of West Siberia. Descriptions are provided and the distribution is traced for the species Azolla filiculoides Lamarck, A. incerta V. P. Nikitin, sp. nov., A. monilifera P. A. Nikitin ex P. I. Dorofeev, and A. tomentosa P. A. Nikitin from the section Azolla G. H. Mettenius, the species Azolla aspera P. I. Dorofeev, A. nana P. I. Dorofeev, A. nikitinii P. I. Dorofeev, A. pseudopinnata P. A. Nikitin, A. suchorukovii P. I. Dorofeev, and A. ventricosa P. A. Nikitin ex P. I. Dorofeev from the section Rhizosperma (F. Meyen) G. H. Mettenius, the species Azolla aculeata V. P. Nikitin, sp. nov., A. atava V. P. Nikitin, sp. nov., and A. cluthiana V. P. Nikitin, sp. nov. from the section Trisepta K. Fowler, as well as the species Azolla asiatica V. P. Nikitin, sp. nov., A. gracilis V. P. Nikitin, sp. nov., A. juganica V. P. Nikitin, sp. nov., A. macrocephala V. P. Nikitin, sp. nov., A. minuta V. P. Nikitin, sp. nov., A. sibirica P. I. Dorofeev, A. theganica V. P. Nikitin, sp. nov., A. tumida V. P. Nikitin, sp. nov., and A. verruculosa V. P. Nikitin, sp. nov., whose affinity to the sections Rhizosperma or Trisepta currently cannot be determined.
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Nosova, N. V., and L. B. Golovneva. "A new species of Pseudotorellia Florin (Ginkgoales) from late Cretaceous deposits of the Lena-Vilui depression (Eastern Siberia)." Palaeobotany 2 (2011): 91–99. http://dx.doi.org/10.31111/palaeobotany/2011.2.91.
Full textAbstract:
The replacement of mesophytic flora, with a predominance of gymnosperms and ferns, by cainophytic flora, with a prevalence of angiosperms, took place in the middle of the Cretaceous Period. The investigation of this phenomenon is of great importance to the understanding of evolution patterns of the major systematic groups, and palaeofloras as a whole. The processes whereby angiosperms appeared and diversified, as well as the processes whereby gymnosperms and ferns met extinction, appear to have different features, depending on the region studied. In Eastern Siberia (the Lena-Vilui depression), the main floristic turnover happened near the Albian-Cenomanian boundary, and was characterized by the abrupt disappearance of all mesophytic elements: the cycadophytes, czekanowskialeans, ancient ginkgoaleans and conifers. Examination of the newly collected fossil plants fr om the Turonian-Coniacian deposits of the Lena-Vilui depression reveals the remains of Pseudotorellia leaves. This finding is the first evidence of the survival of mesophytic relicts in the Late Cretaceous Period within Eastern Siberia, and it changes our knowledge about the last evolutionary stages of the genus Pseudotorellia in Northern Asia. The Lena-Vilui depression is a large basin of non-marine sedimentation, where an almost continuous succession of palaeofloras from the Late Jurassic up to the Coniacian can be traced. Numerous localities of fossil plants are known within the Lena, Vilui, Tyung, Linde, and Lepiske river basins (Budantsev, 1968; Sveshnikova, 1967; Kirichkova, 1985; Golovneva, 2005а,b). The modern stratigraphy of the Mesozoic deposits of this region was created on the basis of investigations carried out by V. A. Vachrameev and Yu. M. Pushcharovsky (1952, 1954). The Lower Cretaceous deposits were divided by those authors into the Batylykh, Eksenyakh and Khatyryk Formations, and the Upper Cretaceous deposits were divided into the Timmerdyakh and Linde Formations. Phytostratigraphy of the Jurassic and Lower Cretaceous deposits were studied by A.I. Kirichkova (1985), and the Upper Cretaceous deposits studied by L. B. Golovneva (2005а,b). The floral development of the Albian and Late Cretaceous was divided into three stages (Golovneva, 2005а): Khatyrykian (Albian), Boskhian (Cenomanian) and Viluian (Turonian-Coniacian). Khatyrykian flora comes from the Khatyryk Formation. It is the last mesophytic flora of the Lena-Vilui depression. It is characterized by high species diversity and consists of more than 100 species. This assemblage comprises mostly ferns, cycadophytes, ginkgoaleans, czekanowskialeans, and conifers like other Early Cretaceous floras of Northern Asia. Angiosperms are rare, and are represented by several small-leaved species from the genera Trochodendroides and Morophyllum (Kirichkova, Budantsev, 1967; Golovneva, 2005a). The Boskhian flora comes from the lower part of the Timmerdyakh Formation. The species composition, and ratios between the main systematic groups, in this flora are significantly different from those of the Khatyrykian flora. Cycadophytes, czekanowskialeans, ancient ginkgoaleans (Pseudotorellia, Sphenobaiera), and conifers (Podozamites) disappeared in the Boskhian time. Overwhelming, the majority of ferns also disappeared and, on the whole, this group loses its dominant position. In Boskhian flora, taxodiaceous conifers and angiosperms began to dominate. The angioperms are represented by large-leaved forms from the genera Menispermites, Trochodendroides, Pseudoprotophyllum, Araliaephyllum, Cinnamomophyllum, Scheffleraephyllum, Celastrophyllum, and Liriodendropsis. The absence of any early Cretaceous survivals is a distinguishing feature of the Siberian Cenomanian floras; this is in contrast to the Late Cretaceous floras of Northeastern Russia, wherein many Early Cretaceous elements persisted up to the end of the Cretaceous (Vakhrameev, 1988). The Viluian flora comes from the upper part of the Timmerdyakh Formation. This assemblage includes about 80 species, and is characterized by a predominance of angiosperms from genera Menispermites, Araliopsoides, Paraprotophyllum, Platanus, Pseudoprotophyllum, Trochodendroides, Araliaephyllum, Magnoliaephyllum, Cissites, Celastrophyllum, Dalembia, Hollickia, Nordenskioldia and Quereuxia. As of yet, no relicts of Early Cretaceous taxa are recorded in the observed Viluian flora. However, lanceolate leaf fragments with parallel venation were discovered during the latest investigation of the newly collected Viluian fossil plants. The study of epidermal characteristics allows assigning these remains to the genus Pseudotorellia of the order Ginkgoales. This genus was erected by R. Florin (1936) for leaves from the Lower Cretaceous deposits of Spitzbergen. Later, the generic diagnosis was amended several times (Watson, 1969; Bose, Manum, 1990). In this paper, the findings of Pseudotorellia from the upper part of the Timmerdyakh Formation are described as a new species, P. insolita (N. Nosova et Golovn., sp. nov). Although the main morphological and epidermal features of these leaves are consistent with a diagnosis of the genus Pseudotorellia; the new species differ in some features from all known species of this genus. To date, the genus Pseudotorellia includes about 38 species. V. A. Krassilov (1972) described megastrobiles Umaltolepis, which were associated with the leaves of P. angustifolia Dolud., and erected for these remains the family Pseudotorelliaceae belonging to the order Ginkgoales. The majority of the Pseudotorellia species were found in Jurassic and Lower Cretaceous deposits. At that time, the genus Pseudotorellia was practically an obligatory element of all the palaeofloras from the eastern areas of the Euro-Sinian paleofloristic realm and the western areas of the Siberian realm. From the Late Cretaceous deposits, only one finding of Pseudotorellia is known. This is P. postuma Samyl. from the Arkagala Formation of northeastern Russia (Samylina, 1988). On the basis of the latest data, the age of the Arkagala flora is defined as the Santonian-Campanian (Herman, 1999). Therefore, P. postuma is younger than P. insolita. This species comes from the vicinity of the Okhotsk-Chukotka volcanogenic belt. The latter region is characterized by the survival of different Early Cretaceous relictual taxa in the Late Cretaceous paleofloras (Samylina, 1988). But in Siberia, the finding of P. insolita is the first evidence of survival of the Early Cretaceous relicts. Other records of the genus Pseudotorellia in Siberia are known only from the Albian (Kirichkova, 1985). Leaves of P. tjukansis were found in deposits of the Khatyryk Formation. Therefore, the findings of P. tjukansis and P. insolita are separated from each other by both a long time interval, and by significantly different epidermal characters. The remains of P. insolita are represented only by fragments which come from a plant debris layer. This type of preservation, and the scarce abundance of these remains, allows us to conjecture a rather long transport of Pseudotorellia leaves to a burial place. It seems probable that Pseudotorellia trees may grow in more elevated environments. Such an interpretation is consistent with accepted theories which suggest that early angiosperms in the middle of the Cretaceous preferred lowland environments and inhabited mainly river valleys and coastal plains (Retallack, Dilcher, 1981), while a considerable quantity of mesophytic gymnosperms may have occupied upland environments wh ere they may have survived up to the end of the Cretaceous (Krassilov, 1985).
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Alekseev, P. I. "New angiosperm species from the late Cretaceous Antibes flora." Palaeobotany 3 (2012): 12–22. http://dx.doi.org/10.31111/palaeobotany/2012.3.12.
Full textAbstract:
The paper presents new data about the Antibes flora, which is one of the richest Cretaceous floras in Western Siberia. Five new species of angiosperms from the localities Antibes and Archekas (Kemerovo region) are described: Archaeampelos senonica P. Alekseev sp. nov., Camptodromites sibiricus P. Alekseev sp. nov., Celastrinites lanceolatus P. Alekseev sp. nov., Cissites basicordatus P. Alekseev sp. nov. and Juglandiphyllites microdentatus P. Alekseev sp. nov.
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Danilova, A. V. "The main stages of the palynoflora in the Ufa and Kazan time in the North–West part of the Timan–Pechora petroleum province." Palaeobotany 3 (2012): 23–31. http://dx.doi.org/10.31111/palaeobotany/2012.3.23.
Full textAbstract:
Results of the palynological study of the Lower-Middle Permian terrigenous deposits of the NorthWest part of the Timan-Pechora petroleum province (from the wells 1-Narjan-Mar, 140-Kolguev, Peschanoozorskaya 1/4, Severo-Zapadnaya 202) are presented. Three miospore assemblages are established. They characterize the main stages of the palynofl ora in the Ufa and Kazan time and allow to reconstruct paleoclimatic conditions in this territory.
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Golovneva, L. B. "The Late Cretaceous flora of the Khatanga depression." Palaeobotany 3 (2012): 32–61. http://dx.doi.org/10.31111/palaeobotany/2012.3.32.
Full textAbstract:
Fossil plants from the Late Cretaceous deposits of the Khatanga depression are joined in three floristic assemblages: the Ledyanaya assemblage (the Turonian-Coniacian), the Kheta assemblage (the late Coniacian-early Santonian) and Mutino assemblage (the late Santonian-early Campanian). The Ledyanaya floristic assemblage contains ferns (Anemia rarinervis Abramova), cycadophytes (Nilssonia sp.), ginkgoales (Ginkgo ex gr. sibirica Heer), conifers (Taxodium sp., Sequoia tenuifolia (Schmalh.) Sveshn. et Budants.) and angiosperms (Pseudoprotophyllum hatangaense Abramova, Liriodendropsis simplex (Newb.) Newb., Trochodendroides sp., ะกissites sp., Dicotylophyllum sp.). The characteristic features of this assemblage are depauperated composition of angiosperms and survival of the Early Cretaceous relic elements. The Kheta floristic assemblage contains only Taxodium sp. and Trochodendroides sp. The Mutino floristic assemblage contains Sequoia tenuifolia, Pseudoprotophyllum hatangaense, Quereuxia angulata (Newb.) Krysht. ex Baik. and Cobbania corrugata (Lesq.) Stockey, Rothwell et Johnson. The Ledyanaya floristic assemblage is very similar with the Newsiberian flora from the Derevyannye Gory Formation of New Siberia Island. The Mutino floristic assemblage have common elements with Kundur flora (the Campanian) from the Kundur Formation of Amur region. The abundance of large leaves of Pseudoprotophyllum in the Mutino flora is evidence of the preservation of humid warm-temperate climate in the northern part of Siberia up to the Campanian. The presence of water plants Quereuxia angulata and Cobbania corrugada indicates the westward migration of some characteristic elements of the Pacific ocean lowlands.
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Gomankov, A. V., and V. F. Tarasevich. "The morphology and ultrastructure of pollen grains of Scutasporites nanuki Utting (Sashiniaceae, Coniferales) from the Permian of the East-European Platform." Palaeobotany 3 (2012): 5–11. http://dx.doi.org/10.31111/palaeobotany/2012.3.5.
Full textAbstract:
Dispersed bisaccate pollen grains of Scutasporites nanuki were studied by means of LM, SEM and TEM. Sacci ultrastructure of these pollen grains was rather peculiar. Sacci were like a thin fi lmy fringe attached to the central body near the equator. They were fi lled with sporopollenin elements of irregular shape and various dimensions with equally various cavities between them. Such an ultrastructure is called as spongy. The morphology and ultrastructure of S. nanuki is discussed in the context of the evolution of early conifers.
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Nosova, N. V. "Female reproductive structures of Ginkgo gomolitzkyana N. Nosova, sp. nov. from the Middle Jurassic of Angren (Uzbekistan)." Palaeobotany 3 (2012): 62–91. http://dx.doi.org/10.31111/palaeobotany/2012.3.62.
Full textAbstract:
Ovules (seeds) of Ginkgo gomolitzkyana N. Nosova, sp. nov. are described from the Angrenian Formation of the Middle Jurassic in Angren, Uzbekistan. Ovules are attached to pedicels with a collar at bases. Collar diameter of G. gomolitzkyana is similar to that of G. ginkgoidea from the Middle Jurassic of Sweden and G. apodes from the Lower Cretaceous of China. Unfortunately the epidermal structures of the two last species are not described. Epidermal patterns of the outer surface of the collar of G. gomolitzkyana are similar to those of G. yimaensis. Lack of data on the structures of the collar inner surface of G. gomolitzkyana does not allow any detailed comparison. G. yimaensis differs from G. gomolitzkyana by 1.5โ€”2 times larger collar diameter. The ovules (seeds) of G. gomolitzkyana are similar to the ovules (seeds) of G. ginkgoidea, G. yimaensis, G. apodes, G. cranei and Ginkgo sp. (Deng et al., 2004), but they are smaller. The cuticle of the integument and the nucellus cuticle of G. apodes and Ginkgo sp. are not described, what does not allow a comparison with them. G. cranei, unlike G. gomolitzkyana, has thicker outer cuticle of integument and lacking papillae on the subsidiary cells of the stomata. The structures of megaspore membrane are studied only for G. ginkgoidea and G. yimaensis. They are similar to the structures of G. biloba and G. gomolitzkyana. Megaspore membrane of G. ginkgoidea is thicker, than that of G. gomolitzkyana. The dimensions of lacuna and bacula of G. ginkgoidea are not specified. The bacula of the megaspore membrane of G. yimaensis are smaller, than those of G. gomolitzkyana. In addition, G. yimaensis differs from the new species by the curved anticlinal cell walls of the outer integument epidermis. Unlike G. gomolitzkyana anticlinal cell walls of the nucellus of G. ginkgoidea are sometimes sinuous and mostly puncticulate. The seeds of G. biloba are five times larger than seeds of G. gomolitzkyana. The thickness of the outer integument cuticle of the living species is larger and the bacula of the megaspore membrane are thicker. This is the first record of the female reproductive structure of Ginkgo from the Jurassic in the Middle Asia.
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Shczepetov, S. V., and A. B. Herman. "Late Cretaceous Kholokhovchan floral assemblage of the Okhotsk-Chukotka volcanogenic belt (North-Eastern Asia)." Palaeobotany 4 (2013): 116–47. http://dx.doi.org/10.31111/palaeobotany/2013.4.116.
Full textAbstract:
Results of comprehensive study of the Kholokhovchan floral assemblage collection is summarized. These plant fossils were collected in 1978 by E. L. Lebedev from volcanogenic deposits in Penzhina and Oklan rivers interfluve, North-Eastern Russia. This assemblage was previously known as a list of Lebedev’s preliminary identifi cations only. He had suggested that the Kholokhovchan assemblage is correlative to the latest Albian — early Turonian Grebenka flora from the Anadyr River middle reaches. However, our study demonstrates that the Kholokhovchan assemblage is most similar to the presumably the Turonian-Coniacian Arman flora of the Okhotsk-Chukotka volcanogenic belt and, therefore, should be dated as the Turonian-Coniacian or Turonian.
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Golovneva, L. B. "New data about the Late Cretaceous floras of the Ulya depression (western coast of Sea of Okhotsk)." Palaeobotany 4 (2013): 148–67. http://dx.doi.org/10.31111/palaeobotany/2013.4.148.
Full textAbstract:
New investigation of fossil plants from volcanic-sedimentary deposits of the Amka Formation in Ulya River basin (southern part of the Okhotsk-Chukotka volcanogenic belt, Northeastern Russia) shows, that the Arinda, Uenma, Ust-Amka and Gyrbykan floristic assemblages from diff erent localities of this formation have very close systematic composition. We propose to joint these assemblages in the single regional flora, which is named the Ulya flora. The Ulya flora consists of almost 40 species. The majority of them are represented by new undescribed taxa. In this flora gymnosperms (Phoenicopsis ex gr. speciosa Heer, Ginkgo ex gr. adiantoides (Ung.) Heer, G. ex gr. sibirica Heer, Sphenobaiera sp., Podozamites sp., Elatocladus spp., Araucarites sp., Sequoia sp., Metasequoia sp., Cupressinocladus sp., Ditaxocladus sp., Pityophyllum sp., Pityostrobus sp.) predominate. Ferns (Asplenium dicksonianum Heer, Arctopteris sp., Cladophlebis spp. and several undescribed taxa) and angiosperms (Trochodendroides spp., undetermined Platanaceae, Dicotylophyllum spp., Quereuxia angulate (Newb.) Krysht. ex Baik.) are not abundant. This flora is characterized by presence of the Early Cretaceous relicts (Phoenicopsis, Sphenobaiera and Podozamites), by rarity of angiosperms and by high endemism. On the base of comparison of the Ulya flora with other floras from middle and northern parts of the Okhotsk-Chukotka volcanogenic belt, the age of the Ulya flora is estimated as the Coniacian.
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Nosova, N. V. "The genus Mirovia Reymanowna (Pinopsida): systematics and characteristics of the leaf structure." Palaeobotany 4 (2013): 36–95. http://dx.doi.org/10.31111/palaeobotany/2013.4.36.
Full textAbstract:
The genus Mirovia was established by M. Reymanowna in 1985 for a single species M. szaferi Reymanowna described from the Middle Jurassic of southern Poland and originally referred to the ginkgoaleans. Later, M. N. Bose and S. Manum (1990) assigned it to the conifers, having chosen Mirovia as the type genus of the new family Miroviaceae. The leaves of Mirovia are dimorphic — long and short. Long leaves are linear or lanceolate, short leaves being ⅓—.⁄₁₅ of the long ones, ovate-lanceolate, obovate or oval. Leaves are tapering towards the base, which is sometimes twisted. In some leaves, a small, 1—2 mm long, area at the base is plicate (pl. I, fig. 1—3, pl. II, fig. 7, 8, pl. V, fig. 3; Reymanowna, 1985, pl. I, fig. 2, 3, text-fig. A, M; Nosova, Wcisło-Luraniec, 2007, pl. 1, fig. 1, 13). Sometimes an abscission scar is preserved (pl. I, fig. 3, 4; Reymanowna, 1985, pl. I, fig. 2, 4; Nosova, Wcisło-Luraniec, 2007, pl. 1, fig. 13). There are two veins and 2—7 resin ducts in the leaf mesophyll. The leaves of Mirovia are characterized by stomata arranged in a single zone on the abaxial side of the leaf, which is not embedded into groove. Records of Mirovia leaves are rather numerous in the Jurassic to the Cretaceous of Arctic Canada, Greenland, Europe, Middle Asia, Siberia and Far East (Florin 1922; Samylina, 1961, 1963; Abramova, 1985; Kiritchkova, 1985; Reymanowna, 1985; Manum, 1987; Bose, Manum, 1990; Manum et al., 1991; Hvalj, 1997; Watson et al., 2001; Nosova, 2001; Nosova, Wcisło-Luraniec, 2007; Gordenko, 2007, 2008; Nosova, Kiritchkova, 2008; Bugdaeva, Markevich, 2009). For the first time, remains of Mirovia is reported here from the Late Cretaceous of the Sverdlovsk oblast’ (the Urals) and from the Tambov oblast’ (European Russia, age unknown). The epidermal structure of the leaves from the Sverdlovsk oblast’ fi ts the diagnosis of M. neosibirica (L. Abramova) N. Nosova from the Cenomanian-Turonian of the New Siberian Islands (Russia) (Abramova, 1985; Nosova, 2001; Nosova, Wcisło-Luraniec, 2007). The single leaf of Mirovia from the Tambov oblast’ has similar morphological and epidermal features to the leaves of M. szaferi from the Bathonian of Poland (Reymanowna, 1985; Nosova, Wcisło-Luraniec, 2007). The epidermal structure of the leaves from the Early Cretaceous of the Lena coal basin (Eastern Siberia), identifi ed as M. macrophylla (Florin) N. Nosova (Nosova, Wcisło-Luraniec, 2007), was studied in detail. The diagnosis of M. sibirica (Samyl.) M. N. Bose et Manum (Samylina, 1963; Bose, Manum, 1990) from the Berriasian—Valanginian of the Lena coal basin is emended. The leaves of Mirovia from the Bajocian of Norway (M. macrophylla), the Kimmeridgian of Scotland (M. scotica (Florin) N. Nosova), and the Albian of West Greenland (M. hallei (Florin) N. Nosova), stored in the Museum of Natural History of Sweden (Stockholm), are reconsidered. Diagnostic features of Mirovia leaves are discussed and an emended diagnosis of the genus is provided.
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Golovneva, L. B., and S. V. Shczepetov. "The Yana floristic assemblage from the Upper Cretaceous volcanic deposits of the northern coast of Sea of Okhotsk." Palaeobotany 4 (2013): 5–35. http://dx.doi.org/10.31111/palaeobotany/2013.4.5.
Full textAbstract:
The Yana floristic assemblage occurs from tuffs and tuffites of the upper part of the Ola Formation (the Campanian) of the Okhotsk-Chukotka volcanogenic belt (OCVB). The locality is situated in the upper part of the Yana River basin (Magadan Region). The Yana assemblage is composed of 18 taxa: Polypodiophyta: Cladophlebis sp., Mygdykitia ochotica Golovn. et Shczep., gen. et sp. nov. Cycadopsida: Ctenis paljavaensis Philipp. Czekanowskiopsida: Phoenicopsis ex gr. angustifolia Heer Pinopsida: Picea yanensis Golovn. et Shczep., sp. nov., Piсea sp., Pityostrobus sp., Pityolepis sp. 1, 2, Pityocladus sp., Cupressinocladus sp., Elatocladus anorovii Golovn. et Shczep., sp. nov. Magnoliopsida: Quereuxia angulata (Newb.) Krysht. ex Baik., Trochodendroides sp. 1, 2, Dicotylophyllum sp. 1—3. Among them, three species and one genus are firstly described. According to general systematic composition the Yana floristic assemblage is similar to the Ola flora (the Campanian) from the Arman River and the Maltan River basins and has some common taxa with the Chaun flora (the Coniacian) of the Central Chukotka. But the Yana assemblage does not contain typical species of the Ola and the Chaun floras and differs from them by some endemic species. The Yana floristic assemblage comes from coarse-grained weakly stratified tuffites, whereas the plant remains of the Ola flora are usually connected with fi ne-grained bedded volcanogenic-terrigenous lacustrine deposits. It is possible to assume, that the Yana floristic assemblage reflects the vegetation of upland slope habitats, whereas the Ola flora characterizes the vegetation of lowlands near the lakes at volcanic plateau.