Results 111 to 120 of about 5,570 (219)

Stable oxygen isotopes of crocodilian tooth enamel allow tracking Plio-Pleistocene evolution of freshwater environments and climate in the Shungura Formation (Turkana Depression, Ethiopia) [PDF]

Biogeosciences
This study adopts a new approach describing palaeohydrology and palaeoclimates based on the interpretation of stable oxygen isotopes (δ18Op) recorded in fossil crocodilian teeth.
A. Gardin, E. Pucéat, G. Garcia, J.-R. Boisserie, J.-R. Boisserie, A. Euriat, M. M. Joachimski, A. Nutz, M. Schuster, O. Otero   +9 more
doaj   +1 more source

Size, not phylogeny, explains the morphology of the endosseous labyrinth in the crown clade Crocodylia

Journal of Anatomy, Volume 246, Issue 4, Page 558-574, April 2025.
Here, we present the most complete dataset to date on the endosseous labyrinths of extant crocodylians. Using 3D geometric morphometrics, we show that allometry constitutes a major contributor of the shape variation of the crocodylian endosseous labyrinths and that the development of this structure is likely linked to the braincase conformation, in all
Yohan Pochat‐Cottilloux, Gwendal Perrichon, Lionel Hautier, Nicolas Rinder, Romain Amiot, Irena Raselli, Jérôme Adrien, Joël Lachambre, Vincent Fernandez, Jeremy E. Martin   +9 more
wiley   +1 more source

Crocodylomorph eggs and eggshells from the Lourinhã Fm. (Upper Jurassic), Portugal [PDF]

, 2014
We here present fossil crocodylomorpha eggshells from the Late Jurassic Lourinhã Formation of Portugal, recovered from five sites: one nest from Cambelas and various fragments from Casal da Rola, Paimogo I, Paimogo II, and Peralta.
Balbino, Ausenda, Marzola, Marco, Mateus, Octávio, Russo, João   +3 more
core  

Anatomy of spinal CSF loss in the American alligator (Alligator mississippiensis)

Journal of Anatomy, Volume 246, Issue 4, Page 575-584, April 2025.
India ink introduced into the cranial cerebrospinal fluid (CSF) compartment of Alligator diffuses along the spinal cord and exits the spinal compartment using perineural flow, resulting in a prominent “ink cuff” forming at the base of the spinal nerve. In Alligator, the region of the ink cuff is drained by a small lymphatic vessel.
Hadyn DeLeeuw, Michael Cramberg, Matthew Dille, Emily Pick, Mary Thompson, Bruce A. Young   +5 more
wiley   +1 more source

Reptilian Heart Development And The Molecular Basis Of Cardiac Chamber Evolution [PDF]

, 2009
The emergence of terrestrial life witnessed the need for more sophisticated circulatory systems. This has evolved in birds, mammals and crocodilians into complete septation of the heart into left and right sides, allowing separate pulmonary and systemic ...
A Greil, AD Mori, Alessandro D. Mori, AM Shedlock, AP Farrell, Benoit G. Bruneau, BG Bruneau, BG Bruneau, BG Bruneau, Bogac L. Kaynak, Brian L. Black, CG Farmer, DG McFadden, E Greenbaum, EB Holmes, EN Olson, Eric N. Olson, FA Stennard, GJW Webb, H Chen, H Lickert, JK Takeuchi, Judith Cebra-Thomas, Juli Wade, Jun K. Takeuchi, JW Hicks, K Koshiba-Takeuchi, Kazuko Koshiba-Takeuchi, Laural Beck, ME Horb, Mona Nemer, MP Verzi, O Rieppel, R Georges, R. Mark Henkelman, Romain O. Georges, RS Seymour, S Trajanovska, SB Carroll, SB Hedges, Scott F. Gilbert, Stephany Latham, T Lyson, Tatyana Sukonnik, TJ Sanger, WJ Hillenius   +45 more
core   +3 more sources

The wide gape of snakes: A comparison of the developing mandibular symphysis in sauropsids

Journal of Anatomy, EarlyView.
Our analysis explores the adaptations at the mandibular symphysis required to allow extreme lower jaw mobility in macrostomate snakes taking a comparative approach. Abstract The origin and evolution of snakes has been marked by the acquisition of many morphological and functional novelties, one of which is the possession of a highly kinetic skull ...
Maricci Basa, Neal Anthwal, Ryan N. Felice, Abigail S. Tucker   +3 more
wiley   +1 more source

Electrical activation of the ventricular myocardium of the crocodile Crocodylus johnstoni: A combined microscopic and electrophysiological study [PDF]

, 1999
We mapped the sequence of ventricular depolarization in the crocodile Crocodylus johnstoni. We also attempted to find specialized conduction tissue within the ventricular myocardium.
Burggren, Cranefield, Durrer, Durrer, E Christian, G.C Grigg, Grigg, Harris, Kaplan, Koplra, Mullen, Robb, Scher, Scher, Shmakov, Spach, Valentinuzzi, Valentinuzzi, White   +18 more
core   +2 more sources

Morphology and osteo‐histology of the weigeltisaurid wing: Implications for aerial locomotion in the world's first gliding reptiles

Journal of Anatomy, EarlyView.
This study investigates the morphology and osteo‐histology of the wing skeleton of the world's first gliding reptiles, showing how it differs from those of extant gliding lizards, yet is also convergently similar. These findings pave the way for future biomechanical studies on the gliding locomotion of these emblematic fossil animals. Abstract The Late
Valentin Buffa, Jordan Gônet, Thomas van de Kamp, Marcus Zuber, Marc Girondot, Eberhard Frey, J.‐Sébastien Steyer, Michel Laurin   +7 more
wiley   +1 more source

The affinities of Proterochampsa barrioneuvoi Reig [PDF]

, 1975
Proterochampsa barrioneuvoi Reig is re-examined and is confirmed as a proterosuchian thecodont. None of the features previously thought to ally it to the Crocodilia are solely characteristic of that group.
Cruickshank, Arthur R I
core  

Integrative taxonomy supports DNA barcoding in revealing an abundant cryptic species in the United States Coastal Plain

Journal of Systematics and Evolution, EarlyView.
We present the most densely sampled phylogeny of Carex section Lupulinae to date (107 specimens) and describe herein a new cryptic species for science from the southern United States, which is locally abundant and found in well‐explored and densely populated areas. Combining DNA sequences with morphometric data obtained from 299 samples, we Demonstrate
Étienne Lacroix‐Carignan, Julian R. Starr, Robert F. C. Naczi, Eran S. Kilpatrick, Étienne Léveillé‐Bourret   +4 more
wiley   +1 more source