Results 191 to 200 of about 2,363 (235)
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Kinematic model of tyrannosaurid (dinosauria: theropoda) arctometatarsus function
Journal of Morphology, 2002AbstractWe present a hypothesis of tyrannosaurid foot function termed the “tensile keystone model,” in which the triangular central metatarsal and elastic ligaments dynamically strengthened the foot. The tyrannosaurid arctometatarsus, in which the central metatarsal is proximally constricted, displays osteological correlates of distal intermetatarsal ...
Eric, Snively, Anthony P, Russell
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Journal of Paleontology
The allosauroid theropod dinosaurs of the clade Carcharodontosauridae were the apex predators in terrestrial ecosystems of the Early Cretaceous but were replaced in this ecological niche by Tyrannnosauridae in the Late Cretaceous.
A. Averianov +3 more
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The allosauroid theropod dinosaurs of the clade Carcharodontosauridae were the apex predators in terrestrial ecosystems of the Early Cretaceous but were replaced in this ecological niche by Tyrannnosauridae in the Late Cretaceous.
A. Averianov +3 more
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Did oviraptorosaurs (Dinosauria; Theropoda) inhabit Argentina?
Cretaceous Research, 2007Abstract In this contribution a putative oviraptorosaurian cervical vertebra discovered in the Campanian-Maastrichtian El Brete Formation from Salta Province, NW Argentina is analysed. Based on the resemblances of this vertebra with those of the basal neoceratosaurian Elaphrosaurus and with the noasaurid Noasaurus , the Salta specimen is ...
Federico L. Agnolin +1 more
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Historical Biology, 2023
The holotype of Sinosaurus triassicus is poorly preserved, and no previous research has focused exclusively on its anatomy. This research reports a new specimen recovered near the locality of the holotype of S.
Zewei Zhang, Tao Wang, H. You
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The holotype of Sinosaurus triassicus is poorly preserved, and no previous research has focused exclusively on its anatomy. This research reports a new specimen recovered near the locality of the holotype of S.
Zewei Zhang, Tao Wang, H. You
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American Museum Novitates
Despite a relatively abundant fossil record, the enigmatic and morphologically bizarre oviraptorosaurs suffer from a sparse and often taxonomically convoluted descriptive body of literature.
William Foster, M. Norell, A. Balanoff
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Despite a relatively abundant fossil record, the enigmatic and morphologically bizarre oviraptorosaurs suffer from a sparse and often taxonomically convoluted descriptive body of literature.
William Foster, M. Norell, A. Balanoff
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1983
The morphology of theropod locomotion can be derived from that of pseudosuchians. The change from a facultative biped (thecodont) to an obligate theropod biped is understandable in terms of efficiency. Bipedal locomotion is more energy efficient than is a reptilian method of quad rupedal locomotion (Hotton 1980).
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The morphology of theropod locomotion can be derived from that of pseudosuchians. The change from a facultative biped (thecodont) to an obligate theropod biped is understandable in terms of efficiency. Bipedal locomotion is more energy efficient than is a reptilian method of quad rupedal locomotion (Hotton 1980).
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Osteology of the two-fingered oviraptorid Oksoko avarsan (Theropoda: Oviraptorosauria)
Zoological Journal of the Linnean SocietyOviraptorosaurs are among the most diverse and best-known extinct theropod groups. Their bizarre anatomy and their social and reproductive behaviour are now well understood.
Gregory G. Funston
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1982
THEROPODA incertae sedis Fig. 6 Material: Teeth: UCM 39503 (UCMP-V5711) H 3.2 mm, W 1.8 mm; UCM 45063 (UCMP-V5620) H 2.8 mm, W 1.8 mm; UCMP 124986 (UCMP-V73087) H 1.6 mm, W 1.3 mm; UCMP 124987 (UCMP-V73087) H 2.8 mm, W 2.2 mm; and UCMP 124988 (UCMP-V73087) H 2.6 mm, W 2 mm.
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THEROPODA incertae sedis Fig. 6 Material: Teeth: UCM 39503 (UCMP-V5711) H 3.2 mm, W 1.8 mm; UCM 45063 (UCMP-V5620) H 2.8 mm, W 1.8 mm; UCMP 124986 (UCMP-V73087) H 1.6 mm, W 1.3 mm; UCMP 124987 (UCMP-V73087) H 2.8 mm, W 2.2 mm; and UCMP 124988 (UCMP-V73087) H 2.6 mm, W 2 mm.
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Osteohistology ofConfuciusornis sanctus(Theropoda: Aves)
Journal of Vertebrate Paleontology, 2003ABSTRACT An analysis of 80 thin-sections of the long bones of a relatively large and presumably adult specimen of Confuciusornis sanctus, a basal bird from the Early Cretaceous of China, reveals osteohistological patterns similar in some ways to those of extant birds of approximate size, but different in other ways.
A. J. De Ricqlès +4 more
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Cladistics
Tooth attachment and replacement play significant roles in the feeding ecology of polyphyodont vertebrates, yet these aspects have remained largely unexplored in non‐avialan paravians including troodontids.
Shuo Wang +5 more
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Tooth attachment and replacement play significant roles in the feeding ecology of polyphyodont vertebrates, yet these aspects have remained largely unexplored in non‐avialan paravians including troodontids.
Shuo Wang +5 more
semanticscholar +1 more source