Relevant bibliographies by topics / Thylacoleonidae

Academic literature on the topic 'Thylacoleonidae'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Thylacoleonidae"

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Werdelin, L. "Circumventing a Constraint - the Case of Thylacoleo (Marsupialia, Thylacoleonidae)." Australian Journal of Zoology 36, no. 5 (1988): 565. http://dx.doi.org/10.1071/zo9880565.

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Marsupial carnivores of the order Dasyurida are more uniform in molar morphology and jaw geometry than are their placental counterparts. This difference is related to the difference in tooth replacement between marsupials and placentals. In Carnivora, the permanent carnassial can erupt in its (geometrically) permanent position, and the post-carnassial teeth are free to evolve in various ways. In the Dasyurida, each erupting molar in turn functions as carnassial before being pushed forwards (relatively) in the jaw by the next erupting molar, which in turn becomes the carnassial. Thus, in the Dasyurida, all molars come to have carnassiform morphology. One group of Australian fossil carnivores has avoided this constraint: the Thylacoleonidae, 'marsupial lions'. In this group, P3/3 are the teeth functioning as carnassials, having been coopted for this function from the presumed sectorial P3/3 of the herbivorous ancestors of Thylacoleonidae. This has made molar reduction possible in this group, but has brought about some incidental effects. P3/3 lie far forward in the jaw, and the muscle resultant has been shifted forwards to compensate for this, reducing gape, but increasing bite force at I1/1, teeth which function as canines in Thylacoleonidae.
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Megirian, Dirk. "The dentary of Wakaleo Wakaleo vanderleueri (Thylacoleonidae: Marsupialia)." Beagle : Records of the Museums and Art Galleries of the Northern Territory 3, no. 1 (1986): 71–79. http://dx.doi.org/10.5962/p.260875.

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Finch, ME, and L. Freedman. "Functional-Morphology of the Limbs of Thylacoleo-Carnifex Owen (Thylacoleonidae, Marsupialia)." Australian Journal of Zoology 36, no. 3 (1988): 251. http://dx.doi.org/10.1071/zo9880251.

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The limb bones and girdles of an almost complete specimen of the extinct 'marsupial lion' Thylacoleo carnifex, from Moree, New South Wales, have been fully described pictorially, metrically and in text. To investigate limb function, intra- and inter-limb segment indices and limb proportions standardised against the presacral vertebral column, were calculated for 11 samples of extant Australian marsupials. Comparisons were made between these values, those for Thylacoleo and published data for extant placental carnivores. The Thylacoleo fore- and hindlimbs were almost equal in length (FL/HL, 94%) and relatively long compared to the vertebral column (79% and 84%). In the forelimb the radius was clearly longer than the humerus (115%), and the hindlimb the tibia was considerably shorter than the femur (82%). Amongst the marsupials, the main Thylacoleo indices were most similar to those of Sarcophilus, but with some significant differences, notably in propodial/epipodial length ratios. Compared to Panthera leo there were many marked similarities. Morphologically, the Thylacoleo scapula conforms to that found in walking and trotting, rather than climbing, viverrids; the pelvis similarly agrees with that of ambulators and cursors. It was concluded that Thylacoleo carnifex was a slow- medium cursor, possibly capable of leaping. There was also a series of adaptations such as the length of the radius, the stout olecranon, the blade-like fifth metatarsal and the massive terminal phalanx of digit I, clearly implying a carnivorous habit.
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Finch, ME, and L. Freedman. "Functional-Morphology of the Vertebral Column of Thylacoleo-Carnifex Owen (Thylacoleonidae, Marsupialia)." Australian Journal of Zoology 34, no. 1 (1986): 1. http://dx.doi.org/10.1071/zo9860001.

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The vertebral column of Thylacoleo carnifex has been described pictorially, metrically and in text. The column was then analysed by the models of Slijper (1946). Functional comparisons were made with Panthera leo and phylogenetic affinities with Trichosurus vulpecula were investigated. The analysis revealed that head- sacrum length in Thylacoleo was about three-quarters of that in Panthera and three times that in Trichosurus. Relative to trunk length, cervical, thoracic and lumbar lengths in Thylacoleo were similar to those of the lion but different from those of the possum. The Thylacoleo skull and sacrum were relatively longer than those of the possum and the lion. The shape of the sagittal stress curve, the analysis of neural spine lengths and angulations, and the orientations of the zygapophyseal articulations of Thylacoleo suggested the following: the heavy head was supported on a long neck, which revealed little sagittal bending stress and was equipped with relatively high neural spines. T1-3 spines were especially long and stout, and also caudally inclined. These features suggest strong ligamentous and muscular support and considerable mobility of the neck. Although the sacrum was long and robust, implying powerful hindlimbs, the lumbar sagittal stress curve did not show the high values expected, probably due to the counterbalancing effect of the long muscular tail, implied by the large caudal vertebrae.
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Gillespie, Anna K., Michael Archer, and Suzanne J. Hand. "A new Oligo–Miocene marsupial lion from Australia and revision of the family Thylacoleonidae." Journal of Systematic Palaeontology 17, no. 1 (December 6, 2017): 59–89. http://dx.doi.org/10.1080/14772019.2017.1391885.

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Wells, Roderick T., Peter F. Murray, and Steven J. Bourne. "Pedal morphology of the marsupial lion Thylacoleo carnifex (Diprotodontia: Thylacoleonidae) from the Pleistocene of Australia." Journal of Vertebrate Paleontology 29, no. 4 (December 12, 2009): 1335–40. http://dx.doi.org/10.1671/039.029.0424.

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7

Yates, Adam M. "New craniodental remains ofWakaleo alcootaensis(Diprotodontia: Thylacoleonidae) a carnivorous marsupial from the late Miocene Alcoota Local Fauna of the Northern Territory, Australia." PeerJ 3 (November 12, 2015): e1408. http://dx.doi.org/10.7717/peerj.1408.

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New jaws and teeth referable to the rare thylacoleonid marsupialWakaleo alcootaensisare figured and described. The species is the geologically youngest known member of the genus and is only known from the late Miocene Alcoota Local Fauna of the Northern Territory, Australia. A revised diagnosis of the species is presented which is found to be morphologically distinct from its congeners.W. alcootaensiscan be distinguished from other species ofWakaleoby its greater size, deeply recessed masseteric fossa, more steeply angled I1, loss of P2, greater P3to M1ratio and loss of M3. Several characters ofW. alcootaensis, including the increase in size, steeply angled I1, increase of the relative size of P3, and reduction of the molar row are present in at least some species ofThylacoleo. Phylogenetic analysis suggests that these character states are convergences and that there was parallel evolution in these two thylacoleonid lineages.
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Figueirido, Borja, Alberto Martín-Serra, and Christine M. Janis. "Ecomorphological determinations in the absence of living analogues: the predatory behavior of the marsupial lion (Thylacoleo carnifex) as revealed by elbow joint morphology." Paleobiology 42, no. 3 (May 6, 2016): 508–31. http://dx.doi.org/10.1017/pab.2015.55.

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AbstractThylacoleo carnifex, or the “pouched lion” (Mammalia: Marsupialia: Diprotodontia: Thylacoleonidae), was a carnivorous marsupial that inhabited Australia during the Pleistocene. Although all present-day researchers agree that Thylacoleo had a hypercarnivorous diet, the way in which it killed its prey remains uncertain. Here we use geometric morphometrics to capture the shape of the elbow joint (i.e., the anterior articular surface of the distal humerus) in a wide sample of extant mammals of known behavior to determine how elbow anatomy reflects forearm use. We then employ this information to investigate the predatory behavior of Thylacoleo. A principal components analysis indicates that Thylacoleo is the only carnivorous mammal to cluster with extant taxa that have an extreme degree of forearm maneuverability, such as primates and arboreal xenarthrans (pilosans). A canonical variates analysis confirms that Thylacoleo had forearm maneuverability intermediate between wombats (terrestrial) and arboreal mammals and a much greater degree of maneuverability than any living carnivoran placental. A linear discriminant analysis computed to separate the elbow morphology of arboreal mammals from terrestrial ones shows that Thylacoleo was primarily terrestrial but with some climbing abilities. We infer from our results that Thylacoleo used its forelimbs for grasping or manipulating prey to a much higher degree than its supposed extant placental counterpart, the African lion (Panthera leo). The use of the large and retractable claw on the semiopposable thumb of Thylacoleo for potentially slashing and disemboweling prey is discussed in the light of this new information.
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Goswami, Anjali, Nick Milne, and Stephen Wroe. "Biting through constraints: cranial morphology, disparity and convergence across living and fossil carnivorous mammals." Proceedings of the Royal Society B: Biological Sciences 278, no. 1713 (November 24, 2010): 1831–39. http://dx.doi.org/10.1098/rspb.2010.2031.

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Carnivory has evolved independently several times in eutherian (including placental) and metatherian (including marsupial) mammals. We used geometric morphometrics to assess convergences associated with the evolution of carnivory across a broad suite of mammals, including the eutherian clades Carnivora and Creodonta and the metatherian clades Thylacoleonidae, Dasyuromorphia, Didelphidae and Borhyaenoidea. We further quantified cranial disparity across eutherians and metatherians to test the hypothesis that the marsupial mode of reproduction has constrained their morphological evolution. This study, to our knowledge the first to extensively sample pre-Pleistocene taxa, analysed 30 three-dimensional landmarks, focused mainly on the facial region, which were digitized on 130 specimens, including 36 fossil taxa. Data were analysed with principal components (PC) analysis, and three measures of disparity were compared between eutherians and metatherians. PC1 showed a shift from short to long faces and seemed to represent diet and ecology. PC2 was dominated by the unique features of sabre-toothed forms: dramatic expansion of the maxilla at the expense of the frontal bones. PC3, in combination with PC1, distinguished metatherians and eutherians. Metatherians, despite common comparisons with felids, were more similar to caniforms, which was unexpected for taxa such as the sabre-toothed marsupial Thylacosmilus . Contrary to previous studies, metatherian carnivores consistently exhibited disparity which exceeded that of the much more speciose eutherian carnivore radiations, refuting the hypothesis that developmental constraints have limited the morphological evolution of the marsupial cranium.
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Gillespie, Anna K., Michael Archer, Suzanne J. Hand, and Karen H. Black. "New material referable toWakaleo(Marsupialia: Thylacoleonidae) from the Riversleigh World Heritage Area, northwestern Queensland: revising species boundaries and distributions in Oligo/Miocene marsupial lions." Alcheringa: An Australasian Journal of Palaeontology 38, no. 4 (June 3, 2014): 513–27. http://dx.doi.org/10.1080/03115518.2014.908268.

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Dissertations / Theses on the topic "Thylacoleonidae"

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Gillespie, Anna K. School of Biological Earth &amp Environmental Sciences UNSW. "Diversity and systematics of marsupial lions from the Riversleigh world heritage area and the evolution of the Thylacoleonidae." 2007. http://handle.unsw.edu.au/1959.4/40533.

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The fossil record of marsupial lions (family Thylacoleonidae) from Australian Oligo Miocene deposits is generally poor. Study of new material of this family collected from Oligo-Miocene limestone sediments of the Riversleigh World Heritage Area, northwestern Queensland adds significant new information about previously described species and also indicates a greater diversity of thylacoleonids during this period of geological time. Two new genera and five new species are described. Reassessment of the holotype of the type species of Priscileo, P. pitikantensis,indicates it shows stronger affinities to species of the genus Wakaleo than it does to Priscileo roskellyae. Priscileo is regarded here to be a junior synonym of Wakaleo. The cranium and lower dentition of Priscileo roskellyae show significant morphological differences from species of Wakaleo, and this species is referred to a new genus, Lekaneleo. Distinctive morphological differences are identified in the M3s of Wakaleo oldfieldi and W. vanderleueri, species previously distinguished only by relative size differences in their dentitions. Functional morphological assessment of postcranial remains of species of Wakaleo suggests that they were probably scansorial or arboreal, but does not support a previous hypothesis of a fossorial habit. Cladistic analyses of the interrelationships of marsupial lions support the referral of Priscileo pitikantensis to the genus Wakaleo. The monotypic genus Microleo is the sister-group to all remaining thylacoleonid taxa. Species of Lekaneleo are the sistergroup to a Wakaleo/Thylacoleo clade. Intraordinal relationships of thylacoleonids were also investigated. Phylogenetic analyses of the interrelationships of Diprotodontia that included representatives of all extinct vombatiform families as well as extant taxa were conducted employing cranial and dental morphological characters. These analyses provide support for the hypothesis that Thylacoleonidae are members of the suborder Vombatiformes. Two species of Wakaleo (W. oldfieldi and W. vanderleueri) present in Riversleigh deposits are also found at other localities - respectively, the Leaf Locality of central Australia (Kutjamarpu LF) and the Small Hills Locality of northern Australia (Bullock Creek LF) - and suggest age estimations of the relevant Riversleigh sites of early Miocene and late Miocene. The phyletic evolution of Wakaleo suggests that some Riversleigh deposits are probably late Oligocene in age.
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