Results 201 to 210 of about 30,004 (307)

A new basal ornithopod dinosaur from the Lower Cretaceous of China. [PDF]

PeerJ, 2020
Yang Y, Wu W, Dieudonné PE, Godefroit P.   +3 more
europepmc   +1 more source

Allometric patterns in Rhamphorhynchus muensteri and their role in the paleoecology, life habits, and taxonomic framework of pterosaurs

Journal of Anatomy, EarlyView.
The Graphical Abstract ilustrates the different allometric pattern within different Pterosauria groups, highlighting how the allometry influences the flight and habits of Pterosauria. Abstract Pterosaurs were the first vertebrates to achieve powered flight, a result of various unique anatomical adaptations, and significant morphological diversity ...
Gabriela Menezes Cerqueira, João Lucas Da Silva, Ingmar Werneburg, Mario Bronzati, Alex Sandro Schiller Aires, Felipe L. Pinheiro, Rodrigo Temp Müller   +6 more
wiley   +1 more source

A new sauropod dinosaur hindlimb from the Lower Cretaceous Wessex Formation, Isle of Wight, UK. [PDF]

R Soc Open Sci
Higgins RR, Mannion PD, Barrett PM, Upchurch P.   +3 more
europepmc   +1 more source

Computed tomography reveals multiple origins of extreme caudal vertebral pneumaticity in sauropod dinosaurs

Journal of Anatomy, EarlyView.
Here, we present novel CT scan data of caudal vertebrae of six Middle–Late Jurassic sauropods, representing several eusauropod lineages. We synthesise these new data with a comprehensive critical appraisal of purported external and internal evidence for caudal vertebral PSP in Sauropodomorpha.
Samantha L. Beeston, Daniela Schwarz, Paul Upchurch, Stephen F. Poropat, Patrick Asbach, Philip D. Mannion   +5 more
wiley   +1 more source

A new gnetalean macrofossil from the Lower Cretaceous of the Laiyang Basin, eastern China. [PDF]

Plant Divers
Jin P, Zhang M, Du B, Zhang J, Sun B.
europepmc   +1 more source

Computed tomography reveals the endocranial anatomy of Crocodylia: Implications for phylogenetic relationships and ecomorphological convergence across Crocodylomorpha

Journal of Anatomy, EarlyView.
The evaluation of the endocranial anatomy of 43 crocodylian species reveals several differences, including variation in the curvature of the encephalic endocast, the size of the endosseous labyrinth and paratympanic sinuses, and the presence of additional snout sinuses.
Paul M. J. Burke, Philip D. Mannion
wiley   +1 more source

<i>Psittacosaurus houi</i>, a longer snouted psittacosaurid from the Lower Cretaceous Lujiatun Unit of Yixian Formation, China, with the synonymy of the unresolved genus <i>Hongshanosaurus</i> revisited. [PDF]

PeerJ
Ishikawa A, Zheng W, Imai T, Hattori S, Shibata M, Kawabe S, Jin X.   +6 more
europepmc   +1 more source

Relationship between carina size and sternum morphology in birds reflects physical constraints of body size and flight style

Journal of Anatomy, EarlyView.
Sternum morphology varies among birds and is a function of body mass and order. The area of the sternum is inversely related to the area of the keel suggesting that the increase in bone mass associated with a large keel has been mitigated by a reduction in bone mass of the sternum.
D. C. Deeming
wiley   +1 more source

A description of dental microanatomy and implantation geometry in Chamaeleonidae

Journal of Anatomy, EarlyView.
A reassessment of the dental histology in adult chamaeleons reveals the presence of periodontal ligament. Alongside alveolar bone and cementum, these tissues together constitute a compacted and remodelled tripartite periodontium. Our findings include the novel observation of plicidentine‐like protuberances of dentine within underlying bone.
Giles D. Sukkert, Ilaria Paparella, Michael R. Doschak, Aaron R. H. LeBlanc, Michael W. Caldwell   +4 more
wiley   +1 more source

Provenance and Tectonic Setting of the Lower Cretaceous Huanhe Formation in the Northwestern Ordos Basin and Its Implications for Uranium Mineralization. [PDF]

ACS Omega
Sun D, Li H, Xia F, Nie F, Huang G, Zhang Z, Meng F, Pan J, Hu Y.   +8 more
europepmc   +1 more source