Results 71 to 80 of about 1,044 (185)

Histology and fossil diagenesis of a pterosaur tooth from the Crato Formation (Lower Cretaceous of Brazil)

The Anatomical Record, Volume 309, Issue 10, Page 2739-2751, October 2026.
Abstract Pterosaur dental biology remains poorly understood despite its importance for comprehending feeding strategies and flight adaptations. Here, we present the first comprehensive histological analysis of an ornithocheiriform pterosaur tooth from the Lower Cretaceous Crato Formation (Santana Group, Northeast Brazil).
Tito Aureliano, Matheus P. S. Rocha, Francisco P. Lima‐Filho, Aline M. Ghilardi   +3 more
wiley   +1 more source

Endothermy, neuron counts, and other issues: Further remarks on neurocognitive evolution in fossil vertebrates

The Anatomical Record, Volume 309, Issue 10, Page 2560-2573, October 2026.
Abstract Last year, we challenged the view that large‐bodied theropod dinosaurs such as Tyrannosaurus rex resembled primates in cognition and behavior, a proposition made by Herculano‐Houzel in 2023. More recently, Jensen et al. have criticized our work on this topic, raising methodological and conceptual issues.
Kai R. Caspar, Cristián Gutiérrez‐Ibáñez, Hady George, Thomas R. Holtz Jr., Darren Naish, Grant R. Hurlburt   +5 more
wiley   +1 more source

Inter‐microscope comparability of dental microwear texture data obtained from different optical profilometers: Part II Deriving instrument‐specific correction equations for meta‐analyses using published data

The Anatomical Record, Volume 309, Issue 9, Page 2455-2475, September 2026.
Abstract Dental microwear texture analysis (DMTA) has emerged as a valuable method for investigating the feeding ecology of vertebrates. Over the past decade, three‐dimensional topographic data from microscopic regions of tooth surfaces have been collected, and surface texture parameters have been published for both extant and fossil species.
Mugino O. Kubo, T. Kubo, Ellen Schulz‐Kornas, T. M. Kaiser, Daniela E. Winkler   +4 more
wiley   +1 more source

Estimating Total Length of Partially Submerged Crocodylians from Drone Imagery

Drones
Understanding the demographic structure is vital for wildlife research and conservation. For crocodylians, accurately estimating total length and demographic class usually necessitates close observation or capture, often of partially immersed individuals,
Clément Aubert, Gilles Le Moguédec, Alvaro Velasco, Xander Combrink, Jeffrey W. Lang, Phoebe Griffith, Gualberto Pacheco-Sierra, Etiam Pérez, Pierre Charruau, Francisco Villamarín, Igor J. Roberto, Boris Marioni, Joseph E. Colbert, Asghar Mobaraki, Allan R. Woodward, Ruchira Somaweera, Marisa Tellez, Matthew Brien, Matthew H. Shirley   +18 more
doaj   +1 more source

Giant extinct caiman breaks constraint on the axial skeleton of extant crocodylians

eLife, 2019
The number of precaudal vertebrae in all extant crocodylians is remarkably conservative, with nine cervicals, 15 dorsals and two sacrals, a pattern present also in their closest extinct relatives.
Torsten M Scheyer, John R Hutchinson, Olivier Strauss, Massimo Delfino, Jorge D Carrillo-Briceño, Rodolfo Sánchez, Marcelo R Sánchez-Villagra   +6 more
doaj   +1 more source

Early Pliocene Varanus (Squamata, Varanidae) remains from Megalo Emvolon, Thessaloniki, Greece

The Anatomical Record, Volume 309, Issue 8, Page 2100-2123, August 2026.
The article describes new cranial and postcranial varanid material from Megalo Emvolon Lower Pliocene vertebrate fossil site near Thessaloniki. The fossils, likely representing a single individual, are referred to Varanus cf. marathonensis. Abstract This study describes new fossil varanid material from a recently discovered fossil spot (MVL site) at ...
Chara Drakopoulou, Georgios L. Georgalis, Georgios Lazaridis, Dimitris S. Kostopoulos   +3 more
wiley   +1 more source

Neuroanatomy of the mekosuchine crocodylianTrilophosuchus rackhamiWillis, 1993

Journal of Anatomy, 2022
AbstractAlthough our knowledge on crocodylomorph palaeoneurology has experienced considerable growth in recent years, the neuroanatomy of many crocodylomorph taxa has yet to be studied. This is true for Australian taxa, where thus far only two crocodylian crocodylomorphs have had aspects of their neuroanatomy explored.
openaire   +4 more sources

The crook in the caudals: Kinematics of defensive tail swipes in the American alligator (Alligator mississippiensis).

Vertebrate Anatomy, Morphology, Palaeontology
The American alligator responds to physical threats with a defensive tail swipe, a lateral and vertical sweep of the tail. Despite the large size of the alligator tail, it accounts for roughly half the length and a quarter of the mass of the entire ...
Marshall Brace, Michael Cramberg, Lauren Gray, Kaitlyn Pyatt, Luanne Xiao, Bruce Young   +5 more
doaj   +1 more source

Ancestral Hybridization Yields Evolutionary Distinct Hybrids Lineages and Species Boundaries in Crocodiles, Posing Unique Conservation Conundrums

Frontiers in Ecology and Evolution, 2018
Interspecific hybridization can lead to adaptation and speciation, especially in the context of recent radiations. The emblematic Crocodylus (true crocodiles) is the most broadly distributed, ecologically diverse, and species-rich crocodylian genus ...
Gualberto Pacheco-Sierra, Gualberto Pacheco-Sierra, Ella Vázquez-Domínguez, Ella Vázquez-Domínguez, Jessica Pérez-Alquicira, Marco Suárez-Atilano, Jerónimo Domínguez-Laso   +6 more
doaj   +1 more source

Crocodylian diversity peak and extinction in the late Cenozoic of the northern Neotropics [PDF]

, 2013
Northern South America and South East Asia are today’s hotspots of crocodylian diversity with up to six (mainly alligatorid) and four (mainly crocodylid) living species respectively, of which usually no more than two or three occur sympatrically.
Delfino, M, Fortier, D C, Scheyer, T. M., Delfino, M., Carlini, A A, Sanchez, R., Sánchez-Villagra, M R; https://orcid.org/, Carlini, Alfredo Armando, Scheyer, T M, Carrillo-Briceño, J D, Aguilera, Oscar Alberto, Quiroz, L., Fortier, D. C., Carrillo Briceño, J. D., Sánchez, R, Aguilera, O A, Quiroz, L, Delfino, Massimo, Sánchez Villagra, M. R.   +18 more
core   +1 more source