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Journal articles on the topic 'Cretaceous'

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1

Fen Chen, Shenghui Deng, and Keqin Sun. "Early Cretaceous Athyrium Roth from Northeastern China." Journal of Palaeosciences 46, no. 3 (December 31, 1997): 117–33. http://dx.doi.org/10.54991/jop.1997.1356.

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Four species of the Early Cretaceous genus Athyrium viz., A. cretaceum Chen et Meng, A. fuxinense Chen et Meng, A. hulunianum Chen, Ren et Deng and A. hailaerianum Deng et Chen from Northeastern China have been systematically studied by scanning electron microscope. The palaeoecology of the Early Cretaceous Athyrium has also been discussed in detail in this paper.
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2

Wheeler, E. A., J. McClammer, and C. A. LaPasha. "Similarities and Differences in Dicotyledonous Woods of the Cretaceous and Paleocene. San Juan Basin, New Mexico, Usa." IAWA Journal 16, no. 3 (1995): 223–54. http://dx.doi.org/10.1163/22941932-90001407.

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Fossil wood is common in the Late Cretaceous and Early Paleocene of the San Juan Basin, New Mexico. Six types of dicotyledonous wood are recognized: Paraphyllanthoxylon arizonense Bailey, Paraphyllanthoxylon anasazi sp. nov., Plataninium piercei sp. nov., Metcalfeoxylon kirtlandense gen. et sp. nov., Chalkoxylon cretaceum gen. et sp. nov., Carlquistoxylon nacimientense gen. et sp. nov. Woods with the characteristics of Paraphyllanthoxylon arizonense Bailey are the most common and occur in the Cretaceous Kirtland Shale and the Paleocene Ojo Alamo Sandstone and Nacimiento Formation. This wood type's characteristics are stable from the Cretaceous to the Paleocene. There were no significant differences in the vessel diameters, vessel densities, ray sizes, or estimated specific gravities of the P. arizonense woods from the Late Cretaceous (Kirtland Shale) and Early Paleocene (Nacimiento Formation and Ojo Alamo Sandstone). Based on the samples examined for this study, dicotyledonous woods were more diverse in the Cretaceous (five types) than in the Paleocene (two types) of the San Juan Basin. Diameters of the Cretaceous woods examined ranged from 14-40cm indicating they were trees rather than shrubs; diameters of the Paleocene woods examined ranged from 10-80cm. All the woods have generalized structure with combinations of features seen in more than one extant family, order, or subclass. Information from databases for fossil and extant woods indicates that some combinations of features (e. g., solitary narrow vessels, low vessel density and scalariform perforation plates, as seen in Metcalfeoxylon kirtlandense and Chalkoxylon cretaceum), while relatively common in the Cretaceous, represent strategies of the hydraulic system that are extremely rare in the Tertiary and at present. None of the dicotyledonous woods have distinct growth rings, although some samples of Paraphyllanthoxylon arizonense from the Paleocene show variations in vessel density and vessel diameter that may correspond to seasonal variations in water availability.
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3

Kirejtshuk, A. G., S. A. Kurbatov, and A. Nel. "A new species of the genus Clidicus from Lower Cretaceous of France (Coleoptera: Staphylinidae: Scydmaeninae)." Proceedings of the Zoological Institute RAS 319, no. 4 (December 25, 2015): 508–14. http://dx.doi.org/10.31610/trudyzin/2015.319.4.508.

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4

BARTEL, CHRISTIAN, JASON A. DUNLOP, and GONZALO GIRIBET. "An unexpected diversity of Cyphophthalmi (Arachnida: Opiliones) in Upper Cretaceous Burmese amber." Zootaxa 5296, no. 3 (May 29, 2023): 421–45. http://dx.doi.org/10.11646/zootaxa.5296.3.6.

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Ten new Cyphophthalmi specimens (Arachnida: Opiliones) from the Upper Cretaceous (Lower Cenomanian) Burmese amber of northern Myanmar are described. Seven of these are placed in Stylocellidae, the predominant extant family found today in Southeast Asia. Sirocellus iunctus gen. et sp. nov. represents the first fossil with a combination of sironid and stylocellid characters, suggesting a still ongoing transition in some lineages during the Upper Cretaceous. Mesopsalis oblongus gen. et sp. nov. represents a second fossil with elongated ozophores, a character not known from modern species. Leptopsalis breyeri sp. nov. is the first Cretaceous cyphophthalmid assignable to an extant genus. The species Foveacorpus cretaceus gen. et sp. nov. and F. parvus gen. et sp. nov., which cannot be placed in an extant family, show morphological novelties for Cyphophthalmi such as numerous pits covering the whole body. The possible function of these pits is discussed. Three more adult males with unique adenostyles and two juveniles are not formally named but further indicate an already highly diverse cyphophthalmid fauna during the Cretaceous. The total number of named Burmese amber Cyphophthalmi species is raised from one to six, and the total fossil record for this suborder now stands at eight.
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5

Triskova, Katerina, Gabriela Packova, Alexander S. Prosvirov, and Robin Kundrata. "Burmogonus gen. nov., a New Click Beetle (Coleoptera: Elateridae: Elaterinae) from Mid-Cretaceous Burmese Amber." Diversity 14, no. 12 (December 5, 2022): 1070. http://dx.doi.org/10.3390/d14121070.

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The click beetles (Elateridae) originated in the Mesozoic and recently form a relatively large family with approximately 10,000 described species worldwide. However, the Mesozoic, and particularly Cretaceous, click beetle fauna remains very poorly known. Here we describe Burmogonus cretaceus gen. et sp. nov. based on a single, relatively well-preserved, specimen from the mid-Cretaceous Burmese amber. This species can be assigned with confidence to the subfamily Elaterinae, and based on the supra-antennal carinae being incomplete across the head and directed to the labrum, the shape of metacoxal plates, and simple tarsi, we tentatively place it in the tribe Elaterini. We discuss the morphology of a new genus and other Elaterinae described from Burmese amber.
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6

Jensen, Jørn Bo, and Niels Erik Hamann. "Geological mapping of Mesozoic deposits along the eastern margin of the R0nne Graben, offshore Bornholm, Denmark." Bulletin of the Geological Society of Denmark 37 (April 10, 1989): 237–60. http://dx.doi.org/10.37570/bgsd-1988-37-19.

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Detailed shallow seismic investigations of the eastern R0nne Graben, offshore Bomholm have resulted in the recognition of characteristic seismic facies which are subdivided into seismostratigraphic units. The seismostratigraphic units are correlated with known lithostratigraphic units on Bomholm, thus permitting detailed geological mapping along the eastern margin of the Rønne Graben. In contrast to the sequence on Bomholm, it appears that there was continuous sedimentation from the R0nne Formation (Lower Jurassic) to the Rabekke Formation (Lower Cretaceous), while the Robbedale and Jydegard Formations (Lower Cretaceous) are absent in the R0nne Graben. In the area mapped in detail the youngest Pre-Quaternary sediments are the Arnager Greensand, the Amager Limestone and the Bavnodde Greensand Formations (Upper Cretaceous). All the Mesozoic deposits were affected by transpressional tectonic activity during the Upper Cretace­ous - Lower Tertiary. The structural relationships show a characteristic pattern consisting of the main fault on the eastern side of the Rønne Graben and a system of en echelon reverse faults. This pattern probably formed as a result of northeast-southwest wrench movements in a compressional dextral strike slip system.
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7

Van der Ham, Raymond W. J. M., Johanna H. A. Van Konijnenburg-van Cittert, Sjir Renkens, and Peta A. Hayes. "The type of Palmocarpon cretaceum Miq., 1853 described from the Cretaceous of the Sint-Pietersberg, The Netherlands, is an Eocene Nypa burtinii (Brongn.) Ettingsh., 1879, most likely from the Brussels area, Belgium." Fossil Imprint 78, no. 1 (2022): 44–50. http://dx.doi.org/10.37520/fi.2022.003.

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The study of a few putative palm macrofossils from the type area of the Maastrichtian Stage appeared to have important implications for understanding the composition of the fossil flora of the area, as well as for the nomenclature of fossil palm fruits in general. The type specimen of the palm fruit Palmocarpon cretaceum Miq., 1853 described from the Cretaceous of the Maastrichtian type area belongs to Nypa burtinii (Brongn.) Ettingsh., 1879 from the Eocene, most probably from the Brussels area. The material mentioned by Ubaghs (1885a, b, 1887) as Palmocarpon cretaceum does not represent fossil palm fruits. Therefore, palm pollen is the only evidence for the presence of palms (Arecaceae, or Palmae, excl. Nypa) in the Cretaceous of the Maastrichtian type area. Palmocarpon Miq., 1853 is proposed here as a nomen rejiciendum, and the genus Palmocarpon Lesq., 1878 as a nomen conservandum.
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8

Rayner, R. J., G. Kuschel, and R. G. OBERPRIELER. "Cretaceous weevils from southern Africa, with description of a new genus and species and phylogenetic and zoogeographical comments (Coleoptera: Curculionoidea)." Insect Systematics & Evolution 25, no. 2 (1994): 137–49. http://dx.doi.org/10.1163/187631294x00261.

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AbstractThe mid-Cretaceous weevil fossils from the Orapa Diamond Mine in Botswana are studied, and a new genus and species, Orapaeus cretaceus Kuschel & Oberprieler, is described. This fossil genus is placed in the tribe Eurhynchini of Brentidae and compared with the two extant genera of the tribe. With the discovery of Orapaeus, the family Brentidae can, for the first time, be traced back to Cretaceous times, and there is evidence that the brentid subfamilies and perhaps also the tribes were already differentiated by the Middle Cretaceous. By contrast, the modern families of angiosperm plants were evidently not yet established by then. In consideration of the palaeoflora of Orapa, it is concluded that the environment probably was tropical and the area well vegetated, but that no clues are present as to the likely hostplant(s) of Orapaeus. The differences between Orapaeus and the extant Eurhynchini suggest that the fossil insect fauna of Orapa is generally assignable to extinct forms, and these differences do not support a hypothesis of prolonged evolutionary stasis.
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9

Hancock, J. M., and P. F. Rawson. "Cretaceous." Geological Society, London, Memoirs 13, no. 1 (1992): 131–39. http://dx.doi.org/10.1144/gsl.mem.1992.013.01.13.

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AbstractEarly CretaceousThe Cretaceous Period lasted for about 70 million years. During this time there was a major change in the sedimentary history of the area as tectonism died down and deposition started of an extensive blanket of coccolith ooze: the Chalk. The change took place mainly over a brief interval across the Albian/Cenomanian (Lower/Upper Cretaceous) boundary, at about 95 Ma. Until that time crustal extension along the Arctic-North Atlantic megarifts continued to influence the tectonic evolution of northwest Europe (Ziegler 1982, 1988). This tensional régime caused rifting and block faulting, particularly across the Jurassic-Cretaceous boundary (Late Cimmerian movements) and in the mid Aptian (Austrian phase). During the latter phase, sea-floor spreading commenced in the Biscay and central Rockall Rifts. The northern part of the Rockall Rift began to widen too, possibly by crustal stretching rather than sea-floor spreading (Ziegler 1988, p. 75). During the Albian the regional pattern began to change and by the beginning of the Cenomanian rifting had effectively ceased away from the Rockall/Faeroe area.Most of the Jurassic sedimentary basins continued as depositional areas during the Early Cretaceous, but the more extensive preservation of Lower Cretaceous sediments provides firmer constraints on some of the geographical reconstructions. The marked sea-level fall across the Jurassic-Cretaceous boundary isolated the more southerly basins as areas of non-marine sedimentation, and it was not until the beginning of the Aptian that they became substantially marine.The extent of emergence of highs in the North Sea area is difficult to assess, especially where
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10

Officer, Charles B., Anthony Hallam, Charles L. Drake, and Joseph D. Devine. "Late Cretaceous and paroxysmal Cretaceous/Tertiary extinctions." Nature 326, no. 6109 (March 1987): 143–49. http://dx.doi.org/10.1038/326143a0.

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11

TELNOV, DMITRY, EVGENY E. PERKOVSKY, DMITRY V. VASILENKO, and ROBIN KUNDRATA. "When rare click beetles were not that rare: Cretaceous Cerophytidae Latreille, 1834 (Coleoptera) from Siberia." Palaeoentomology 7, no. 1 (February 27, 2024): 92–103. http://dx.doi.org/10.11646/palaeoentomology.7.1.6.

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Cerophytidae, commonly known as rare click beetles, represent one of the more basal lineages of the beetle superfamily Elateroidea, with a rather diverse fossil record in the Mesozoic. Four fossil species of this group were previously described from the Cretaceous of Siberia. Here, we redescribe Aphytocerus communis Zherichin, 1977 based on newly found amber specimens from Yantardakh (Taimyr Peninsula). We were able to locate and herein discuss the type specimens of two Mesozoic Siberian cerophytids, Baissophytum convexum Chang, Kirejtshuk & Ren, 2011 and Baissopsis ampla (Chang, Kirejtshuk & Ren, 2011), which were described from the Lower Cretaceous Zaza Formation in Transbaikalia. We compare them with A. communis and discuss the morphology of all three genera, and with Brachycerophytum cretaceum Yu, Ślipiński & Pang, 2019 from Burmese amber.
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12

Newton, Alicia. "Cretaceous eccentricity." Nature Geoscience 5, no. 1 (December 22, 2011): 5. http://dx.doi.org/10.1038/ngeo1369.

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13

Newton, Alicia. "Cretaceous forests." Nature Geoscience 5, no. 3 (February 28, 2012): 160. http://dx.doi.org/10.1038/ngeo1419.

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14

Newton, Alicia. "Cretaceous circulation." Nature Geoscience 5, no. 4 (March 30, 2012): 234. http://dx.doi.org/10.1038/ngeo1444.

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15

SPAETH, CHRISTIAN. "Cretaceous cephalopods." Lethaia 31, no. 1 (March 29, 2007): 28. http://dx.doi.org/10.1111/j.1502-3931.1998.tb00485.x.

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16

Senkowsky, Sonya. "Cretaceous Park." Scientific American 287, no. 6 (December 2002): 26–28. http://dx.doi.org/10.1038/scientificamerican1202-26.

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17

Eisenlohr, Laurence C., and Lisa K. Denzin. "Cretaceous collegiality." Molecular Immunology 68, no. 2 (December 2015): 67. http://dx.doi.org/10.1016/j.molimm.2015.08.013.

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18

Miyashita, S., and A. Yoshida. "Pre-Cretaceous and Cretaceous ophiolites in Hokkaido, Japan." Bulletin de la Société Géologique de France IV, no. 2 (March 1, 1988): 251–60. http://dx.doi.org/10.2113/gssgfbull.iv.2.251.

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19

Bata, Timothy. "Evidences of Widespread Cretaceous Deep Weathering and Its Consequences: A Review." Earth Science Research 5, no. 2 (May 2, 2016): 69. http://dx.doi.org/10.5539/esr.v5n2p69.

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This study highlights the effect of the Cretaceous greenhouse climate on weathering processes. Atmospheric CO2 level was relatively higher in the Cretaceous than it was in both the Jurassic and the Cenozoic. Consequently, temperature and humidity were higher in the Cretaceous than in the Jurassic and the Cenozoic. The interaction among the high levels of atmospheric CO2, extreme global warmth, and humidity in the Cretaceous resulted in widespread deep weathering. Cretaceous palaeo-weathering profiles are observed to occur at higher palaeolatitudes relative to the Jurassic and Cenozoic palaeo-weathering profiles. This implies the upward warming of the Cretaceous palaeolatitude, consistent with palaeotemperature estimates for the Cretaceous. The present thickness of weathering profiles in some selected tropical zones is approximately 200 m. During the greenhouse climatic condition in the Cretaceous, the thickness of weathering profiles at those areas could have been up to 4–5 times the present value. This suggests that many sediments were produced from the Cretaceous weathering events.
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20

LI, YAN-DA, ERIK TIHELKA, LOÏC DAHAN, DI-YING HUANG, and CHEN-YANG CAI. "On the Nosodendridae from mid-Cretaceous amber of northern Myanmar (Coleoptera: Nosodendroidea)." Zootaxa 5082, no. 3 (December 17, 2021): 223–44. http://dx.doi.org/10.11646/zootaxa.5082.3.2.

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Nosodendridae is a small polyphagan beetle family with a sparse fossil record. Herein, the fossil Nosodendridae from mid-Cretaceous Burmese amber (ca. 99 Ma) are systematically reviewed. Nosodendron cretaceum Deng et al. is transferred into Archaenosodendron Li & Cai gen. nov., as A. cretaceum (Deng et al.) comb. nov., primarily based on the morphology of prosternum. Three new species of Archaenosodendron from Burmese amber, A. explanatum Li & Cai sp. nov., A. remotidens Li & Cai sp. nov., and A. angulare Li & Cai sp. nov., are also described and illustrated. A key to nosodendrid genera and species from Burmese amber is provided.
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21

Bronson, Allison W., and John G. Maisey. "Resolving the identity of Platylithophycus, an enigmatic fossil from the Niobrara Chalk (Upper Cretaceous, Coniacian–Campanian)." Journal of Paleontology 92, no. 4 (April 15, 2018): 743–50. http://dx.doi.org/10.1017/jpa.2018.14.

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AbstractMisidentified fossils are common in paleontology, but Platylithophycus has undergone a particularly problematic series of descriptions. The holotype of P. cretaceus comes from the Upper Cretaceous Niobrara Chalk of Kansas, and was first described as a calcareous green alga, based on the surface texture of the specimen. Later, Platylithophycus was re-identified as a sepiid cephalopod, based partly on a comparison of microstructure between P. cretaceus and the pen of modern squids. Platylithophycus then became part of the University of Nebraska teaching collection, where, according to paleontological legend, an undergraduate student suggested that the fossil’s tessellated surface looked a lot like shark cartilage. However, that interpretation has not been formally proposed until now. This work re-describes the holotype of Platylithophycus cretaceus as part of the branchial endoskeleton of an elasmobranch, based on both gross morphology and ultrastructure, including recognizable tessellated cartilage with intertesseral pores and joints.
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22

Valečka, J., and V. Skoček. "Late Cretaceous lithoevents in the Bohemian Cretaceous Basin, Czechoslovakia." Cretaceous Research 12, no. 6 (December 1991): 561–77. http://dx.doi.org/10.1016/0195-6671(91)90031-7.

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23

Wilson, Frederic H., James G. Smith, and Nora Shew. "Review of radiometric data from the Yukon Crystalline Terrane, Alaska and Yukon Territory." Canadian Journal of Earth Sciences 22, no. 4 (April 1, 1985): 525–37. http://dx.doi.org/10.1139/e85-054.

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The results of more than 20 years of geochronological studies in the Yukon Crystalline Terrane in east-central Alaska and the western Yukon Territory suggest at least six igneous and thermal (metamorphic?) events. Plutonism during Mississippian, Early Jurassic, mid-Cretaceous, Late Cretaceous, and early Tertiary times is indicated. Evidence also indicates that Mississippian, Early Jurassic, late Early Cretaceous, and late Cretaceous thermal (metamorphic?) events have affected parts of the terrane. The western part of the terrane was affected by a significant regional metamorphic event in late Early Cretaceous time, followed by a terrane-wide mid-Cretaceous plutonic event. The pattern of K–Ar ages allows division of the terrane into domains, bounded by northeast-trending lineaments.
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24

Wolfe, Jack A. "Late Cretaceous-Cenozoic history of deciduousness and the terminal Cretaceous event." Paleobiology 13, no. 2 (1987): 215–26. http://dx.doi.org/10.1017/s0094837300008769.

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Deciduousness in mesic, broad-leaved plants occurred in disturbed, middle-latitude environments during the Late Cretaceous. Only in polar environments in the Late Cretaceous was the deciduous element dominant, although of low diversity. The terminal Cretaceous event resulted in wide-spread selection for plants of deciduous habit and diversification of deciduous taxa, thus leaving a lasting imprint on Northern Hemisphere vegetation. Various environmental factors have played important roles in subsequent diversification of mesic, broad-leaved deciduous taxa and in origination and decline of broad-leaved deciduous forests. Low diversity and rarity of mesic deciduous plants in the post-Cretaceous of the Southern Hemisphere indicate that the inferred “impact winter” of the terminal Cretaceous event had little effect on Southern Hemisphere vegetation and climate.
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25

Saegusa, Haruo, and Yukimitsu Tomida. "Titanosauriform teeth from the Cretaceous of Japan." Anais da Academia Brasileira de Ciências 83, no. 1 (March 2011): 247–65. http://dx.doi.org/10.1590/s0001-37652011000100014.

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Sauropod teeth from six localities in Japan were reexamined. Basal titanosauriforms were present in Japan during the Early Cretaceous before Aptian, and there is the possibility that the Brachiosauridae may have been included. Basal titanosauriforms with peg-like teeth were present during the "mid" Cretaceous, while the Titanosauria with peg-like teeth was present during the middle of Late Cretaceous. Recent excavations of Cretaceous sauropods in Asia showed that multiple lineages of sauropods lived throughout the Cretaceous in Asia. Japanese fossil records of sauropods are conformable with this hypothesis.
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26

Kemper, Edwin, and Reinhard Wolfart. "The Mid-Cretaceous Story." Newsletters on Stratigraphy 20, no. 3 (March 30, 1989): 171–76. http://dx.doi.org/10.1127/nos/20/1989/171.

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27

Deng, Shenghui. "Eogonocormus—A new early cretaceous fern of Hymenophyllaceae from China." Australian Systematic Botany 10, no. 1 (1997): 59. http://dx.doi.org/10.1071/sb96022.

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Eogonocormus gen. nov., a new Early Cretaceous fern of Hymenophyllaceae from north-eastern China, is described based upon the type species Eogonocormus cretaceum sp. nov. The frond is small, thalloid, dichotomous and with a creeping rhizome. The sori are rounded, borne marginally on the fan-like ends of pinnule lobes, with 8–12 sori in each lobe. The spores are rounded or subrounded, trilete, with baculate, granulate, spinate and reticulate sculptures. Hymenophyllites linearifolius Deng is re-examined and transferred to the new genus as E. linearifolium based upon the characteristics of its sori.
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28

Solórzano-Kraemer, Mónica M., Bradley J. Sinclair, Antonio Arillo, and Sergio Álvarez-Parra. "A new genus of dance fly (Diptera: Empidoidea: Hybotidae) from Cretaceous Spanish ambers and introduction to the fossiliferous amber outcrop of La Hoya (Castellón Province, Spain)." PeerJ 11 (January 13, 2023): e14692. http://dx.doi.org/10.7717/peerj.14692.

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Hybotidae fly species, also known as dance flies, in Cretaceous ambers have been described from Lebanon, France, Myanmar, Russia, and Canada. Here we describe Grimaldipeza coelica gen. et sp. n., and recognize another two un-named species, in Spanish amber from the middle Albian El Soplao and lower Cenomanian La Hoya outcrops. The fore tibial gland is present in the new genus, which is characteristic of the family Hybotidae. We compare Grimaldipeza coelica gen. et sp. n. with the holotypes of Trichinites cretaceus Hennig, 1970 and Ecommocydromia difficilis Schlüter, 1978, and clarify some morphological details present in the latter two species. Further taxonomic placement beyond family of the here described new genus was not possible and remains incertae sedis within Hybotidae until extant subfamilies are better defined. We provide new paleoecological data of the hybotids, together with paleogeographical and life paleoenvironmental notes. A table with the known Cretaceous Hybotidae is provided. Furthermore, the La Hoya amber-bearing outcrop is described in detail, filling the information gap for this deposit.
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Gorscak, Eric, and Patrick M. O‘Connor. "Time-calibrated models support congruency between Cretaceous continental rifting and titanosaurian evolutionary history." Biology Letters 12, no. 4 (April 2016): 20151047. http://dx.doi.org/10.1098/rsbl.2015.1047.

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Recent model-based phylogenetic approaches have expanded upon the incorporation of extinct lineages and their respective temporal information for calibrating divergence date estimates. Here, model-based methods are explored to estimate divergence dates and ancestral ranges for titanosaurian sauropod dinosaurs, an extinct and globally distributed terrestrial clade that existed during the extensive Cretaceous supercontinental break-up. Our models estimate an Early Cretaceous (approx. 135 Ma) South American origin for Titanosauria. The estimated divergence dates are broadly congruent with Cretaceous geophysical models of supercontinental separation and subsequent continental isolation while obviating the invocation of continuous Late Cretaceous continental connections (e.g. ephemeral land bridges). Divergence dates for mid-Cretaceous African and South American sister lineages support semi-isolated subequatorial African faunas in concordance with the gradual northward separation between South America and Africa. Finally, Late Cretaceous Africa may have linked Laurasian lineages with their sister South American lineages, though the current Late Cretaceous African terrestrial fossil record remains meagre.
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ROBASZYNSKI, Francis, Annie V. DHONDT, and John W. M. JAGT. "Cretaceous lithostratigraphic units (Belgium)." Geologica Belgica 4, no. 1-2 (April 15, 2002): 121–34. http://dx.doi.org/10.20341/gb.2014.049.

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The Cretaceous formations of the Mons Basin, of the Méhaigne-Petite Gette Basin area and of the Liège-Limburg Basin area are described and discussed following recent literature. Of the 22 Cretaceous formations of the Mons Basin 8 are of Early Cretaceous age and 14 of Late Cretaceous age. In the Méhaigne-Petit Gette Basin area no formations have been named, but the different levels found have been considered as members; their age varies from? Coniacian to Late Maastrichtian. In the Liège-Limburg Basin area four Cretaceous formations have been recognised, divided in very detailed members based on lithostratigraphical characteristics (flints) by Felder; these formations vary in age from? Coniacian to uppermost Maastrichtian.
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31

Manabe, M. "The early evolution of the Tyrannosauridae in Asia." Journal of Paleontology 73, no. 6 (November 1999): 1176–78. http://dx.doi.org/10.1017/s002233600003105x.

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An isolated premaxillary tooth of a tyrannosaurid from the Lower Cretaceous section of the Tetori Group, Central Honshu, Japan, complements Siamotyrannus, which is based upon an incomplete postcranium for existence of tyrannosaurids in the Early Cretaceous of Asia. The occurrence of a tyrannosaurid tooth in the Japanese early Early Cretaceous further supports the possibility that tyrannosaurids originated during the Early Cretaceous in Asia and migrated to North America when the two continents were connected via a land bridge during the early Late Cretaceous. Thickening of the premaxillary teeth might have predated the increase in body size in tyrannosaurid evolution.
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32

Nøhr-Hansen, H., S. Piasecki, and P. Alsen. "A Cretaceous dinoflagellate cyst zonation for NE Greenland." Geological Magazine 157, no. 10 (October 29, 2019): 1658–92. http://dx.doi.org/10.1017/s0016756819001043.

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AbstractA palynostratigraphic zonation is for the first time established for the entire Cretaceous succession in NE Greenland from Traill Ø in the south to Store Koldewey in the north (72–76.5° N). The zonation is based on samples from three cores and more than 100 outcrop sections. The zonation is calibrated to an updated ammonite zonation from the area and to palynozonations from the northern North Sea, Norwegian Sea and Barents Sea areas. The palynozonation is primarily based on dinoflagellate cyst and accessory pollen. The Cretaceous succession is divided into 15 palynozones: seven Lower Cretaceous zones and eight Upper Cretaceous zones. The two lowermost zones are new. The following five (Lower Cretaceous) zones have already been described. Two of the Upper Cretaceous zones are new. The zones have been subdivided into 20 subzones, 11 of which have been described previously and one of which has been revised/redefined. Nine subzones (Upper Cretaceous) are new. More than 100 stratigraphical events representing more than 70 stratigraphic levels have been recognized and presented in an event-stratigraphic scheme.
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33

Colpron, Maurice, Raymond A. Price, and Douglas A. Archibald. "40Ar/39Ar thermochronometric constraints on the tectonic evolution of the Clachnacudainn complex, southeastern British Columbia." Canadian Journal of Earth Sciences 36, no. 12 (December 1, 1999): 1989–2006. http://dx.doi.org/10.1139/e99-100.

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40Ar/39Ar thermochronometry from the Clachnacudainn complex indicates that the thermal evolution of the complex was controlled primarily by the intrusion of granitoid plutons in mid- and Late Cretaceous times. Hornblendes from the eastern part of the complex cooled below their Ar closure temperature (ca. 500°C) shortly after intrusion of the mid-Cretaceous plutons; those from the western part of the complex have latest Cretaceous cooling dates, indicating cooling of these hornblendes after intrusion of the leucogranite plutons at ca. 71 Ma. Micas from the southern Clachnacudainn complex exhibit a pattern of progressive cooling toward lower structural levels, where Late Cretaceous and younger intrusions occur. The occurrence of Late Cretaceous - Paleocene mica cooling dates in both the hanging wall and footwall of the Standfast Creek fault refutes the hypothesis that there has been significant Tertiary extensional exhumation of the Clachnacudainn complex along the Standfast Creek fault. Furthermore, the widespread distribution of Late Cretaceous - Paleocene mica cooling ages suggests that an important volume of Late Cretaceous - early Tertiary intrusive rocks must be present in the subsurface beneath the Clachnacudainn complex.
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34

Ramon, Juan Carlos. "Geoquímica del petróleo de la cuenca del Putumayo." CT&F - Ciencia, Tecnología y Futuro 1, no. 2 (December 31, 1996): 25–34. http://dx.doi.org/10.29047/01225383.595.

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Biomarker fingerprinting of 20 crude oils from Putumayo Basin, Colombia, shows a vertical segregation of oil families. The Lower Cretaceous reservoirs (Caballos and "U" Villeta sands) contain oils that come from a mixture of marine and terrestrial organic matter, deposited in a marginal, "oxic" marine setting. The Upper Cretaceous ("T" and "N" sands) and Tertiary reservoirs contain oils with marine algal input deposited in a reducing, carbonate-rich environment. Lithology, environmental conditions and organic matter type of source rocks as predicted from oil biomarker differences correspond to organic composition of two Cretaceous source rocks. Vertical heterogeneity in the oils, even those from single wells, suggests the presence of two isolated petroleum systems. Hydrocarbons from Lower Cretaceous source rocks charged Lower Cretaceous reservoirs whereas oils from Upper Cretaceous source rocks charged Upper Cretaceous and Tertiary reservoirs. Oil migration from mature source rocks into multiple reservoirs has been stratigraphically updip along the "regional" sandstone units and vertical migration through faults has been limited. Biomarker maturity parameters indicate that all oils were generated from early thermal maturity oil window.
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35

Guinot, Guillaume, and Fabien L. Condamine. "Global impact and selectivity of the Cretaceous-Paleogene mass extinction among sharks, skates, and rays." Science 379, no. 6634 (February 24, 2023): 802–6. http://dx.doi.org/10.1126/science.abn2080.

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The Cretaceous-Paleogene event was the last mass extinction event, yet its impact and long-term effects on species-level marine vertebrate diversity remain largely uncharacterized. We quantified elasmobranch (sharks, skates, and rays) speciation, extinction, and ecological change resulting from the end-Cretaceous event using >3200 fossil occurrences and 675 species spanning the Late Cretaceous–Paleocene interval at global scale. Elasmobranchs declined by >62% at the Cretaceous-Paleogene boundary and did not fully recover in the Paleocene. The end-Cretaceous event triggered a heterogeneous pattern of extinction, with rays and durophagous species reaching the highest levels of extinction (>72%) and sharks and nondurophagous species being less affected. Taxa with large geographic ranges and/or those restricted to high-latitude settings show higher survival. The Cretaceous-Paleogene event drastically altered the evolutionary history of marine ecosystems.
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36

HARRIES, P. J. "The Cretaceous World." PALAIOS 19, no. 6 (December 1, 2004): 618–19. http://dx.doi.org/10.1669/0883-1351(2004)019<0618:br>2.0.co;2.

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37

Smith, A. B., and C. W. Wright. "British Cretaceous Echinoids." Monographs of the Palaeontographical Society 141, no. 578 (December 31, 1987): 1–107. http://dx.doi.org/10.1080/25761900.2022.12131762.

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Smith, A. B., and C. W. Wright. "British Cretaceous Echinoids." Monographs of the Palaeontographical Society 150, no. 602 (December 31, 1996): 268–341. http://dx.doi.org/10.1080/25761900.2022.12131783.

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39

Smith, A. B., and C. W. Wright. "British Cretaceous Echinoids." Monographs of the Palaeontographical Society 143, no. 583 (December 31, 1989): 101–202. http://dx.doi.org/10.1080/25761900.2022.12131767.

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40

Smith, A. B., and C. W. Wright. "British Cretaceous Echinoids." Monographs of the Palaeontographical Society 153, no. 612 (December 31, 1999): 343–92. http://dx.doi.org/10.1080/25761900.2022.12131792.

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41

Smith, A. B., and C. W. Wright. "British Cretaceous Echinoids." Monographs of the Palaeontographical Society 154, no. 615 (December 31, 2000): 391–440. http://dx.doi.org/10.1080/25761900.2022.12131795.

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42

Smith, A. B., and C. W. Wright. "British Cretaceous Echinoids." Monographs of the Palaeontographical Society 156, no. 619 (December 31, 2002): 440–571. http://dx.doi.org/10.1080/25761900.2022.12131799.

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43

Smith, A. B., and C. W. Wright. "British Cretaceous Echinoids." Monographs of the Palaeontographical Society 166, no. 639 (December 31, 2012): 635–727. http://dx.doi.org/10.1080/25761900.2022.12131819.

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44

Minkel, JR. "Greener Cretaceous Pastures." Scientific American 294, no. 2 (February 2006): 28. http://dx.doi.org/10.1038/scientificamerican0206-28c.

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45

Hart, Malcolm B. "Cretaceous foraminiferal events." Geological Society, London, Special Publications 70, no. 1 (1993): 227–40. http://dx.doi.org/10.1144/gsl.sp.1993.070.01.16.

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46

Schulte, P., L. Alegret, I. Arenillas, J. A. Arz, P. J. Barton, P. R. Bown, T. J. Bralower, et al. "Response--Cretaceous Extinctions." Science 328, no. 5981 (May 20, 2010): 975–76. http://dx.doi.org/10.1126/science.328.5981.975.

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47

Lana, C. C., and B. K. Sen Gupta. "Cretaceous Carterina (Foraminifera)." Marine Micropaleontology 41, no. 1-2 (February 2001): 97–102. http://dx.doi.org/10.1016/s0377-8398(00)00050-5.

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48

Remane, Jürgen. "Jurassic-Cretaceous boundary." Geobios 27 (December 1994): 773. http://dx.doi.org/10.1016/s0016-6995(94)80246-7.

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49

Donovan, Stephen K., Clare V. Milsom, and Cornelis J. Veltkamp. "Jamaican Cretaceous Crinoidea." Journal of Paleontology 70, no. 5 (September 1996): 866–71. http://dx.doi.org/10.1017/s002233600002388x.

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Jamaica has the best-known fauna of fossil crinoids of the Antillean islands. Two Cretaceous species have been reexamined on the basis of new material. Lower Cretaceous Apiocrinites sp., previously referred to Austinocrinus n. sp. and first documented from a short pluricolumnal, is now known from brachials and further fragments of column. This is the first millericrinid, and only the second non-isocrinid stalked crinoid, to be identified from the Jamaican and Antillean fossil record. Other ossicles may be derived from the cirri of a comatulid. Applinocrinus cretacea (Bather) is well known from the upper Senonian of England, North America and the West Indies, although Caribbean specimens have not been figured previously. Functional interpretations of the mode of life of Applinocrinus suggest that it was a benthic crinoid, presumably with arms. It lived embedded in the sediment.
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50

Krause, David W., Joseph H. Hartman, Neil A. Wells, Gregory A. Buckley, Charles A. Lockwood, Christine E. Wall, Roshna E. Wunderlich, Joseph A. Rabarison, and Louis L. Randriamiaramanana. "Late Cretaceous mammals." Nature 368, no. 6469 (March 1994): 298. http://dx.doi.org/10.1038/368298a0.

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