Results 171 to 180 of about 292,339 (266)

An unusual titanosaur axis from the Upper Cretaceous of Brazil and its significance for sauropod anatomy and systematics

The Anatomical Record, EarlyView.
Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro, Jeffrey A. Wilson Mantilla, Jhonata H. A. Martins, Fabiano V. Iori, Leonardo S. Paschoa, Alberto B. Carvalho, Joseli M. Piranha, Hussam Zaher   +7 more
wiley   +1 more source

Morphological Investigation of Uncharacterised Cardiovascular Structures in Shallow-Diving, Semi-Aquatic Freshwater Turtles (Chelidae: <i>Emydura macquarii</i>). [PDF]

Vet Sci
Gurkin RJ, Spronhle-Barrera C, Noble L, Maisel N, Gordon J, Lam C, Schaffer-White A, Origgi F, Gonzalez-Astudillo V.   +8 more
europepmc   +1 more source

The internal crest anatomy of Lambeosaurini (Hadrosauridae: Lambeosaurinae)

The Anatomical Record, EarlyView.
Abstract The supracranial crests of lambeosaurine hadrosaurids have long been a focus of study due primarily to their extreme morphology. The external anatomy of lambeosaurine crests is understood to be highly variable between species, but variation in their internal anatomy is less well understood.
Thomas W. Dudgeon, Courtney Brown, David C. Evans   +2 more
wiley   +1 more source

A thyroid hormone-mediated opsin switch initiates metamorphosis in a proto-vertebrate. [PDF]

Sci Adv
Mariossi A, Levine MS.
europepmc   +1 more source

Comparative cranial biomechanics reveal macroevolutionary trends in theropod dinosaurs, with emphasis on Tyrannosauroidea

The Anatomical Record, EarlyView.
Abstract Tyrannosaurus is viewed as a model organism in vertebrate paleontology, with numerous studies analyzing its feeding biomechanics. Nonetheless, the evolution of this feeding performance has been under‐addressed in Tyrannosauroidea, especially in basal tyrannosauroids. Here we used muscle‐force reconstruction and finite element analysis (FEA) to
Evan Johnson‐Ransom, Paul Gignac, Daniel E. Barta, Ryan N. Felice, Eric Snively   +4 more
wiley   +1 more source

The Road so Far: Tracing the Molecular Evolution of Hexokinase Family in Metazoa. [PDF]

Genome Biol Evol
Jardim-Messeder D, de Souza-Vieira Y, Oliveira GAP, Margis R, Mello B, Sachetto-Martins G.   +5 more
europepmc   +1 more source

Osteohistology of two phorusrhacids reveals uninterrupted growth strategy

The Anatomical Record, EarlyView.
Abstract Phorusrhacidae were apex predators that primarily dominated South America ecosystems for at least 40 million years with their imposing size and predatory lifestyle—yet some aspects of their biology remain poorly understood. Osteohistology is a tool for understanding growth dynamics and biomechanical adaptations.
Lotta Dreyer, Christian Cooper, Jingmai O'Connor   +2 more
wiley   +1 more source

Peripheral mechanisms of tactile sensation in fish. [PDF]

Curr Opin Neurobiol
Tan K, Gracheva EO, Bagriantsev SN.
europepmc   +1 more source

Nasal soft‐tissue anatomy of Triceratops and other horned dinosaurs

The Anatomical Record, EarlyView.
Abstract Although ceratopsid dinosaurs possess a characteristically hypertrophied narial region, soft‐tissue anatomy associated with such a skeletal structure and their biological significance remain poorly understood. The present study provides the first comprehensive hypothesis on the soft‐tissue anatomy in the ceratopsid rostrum based on the Extant ...
Seishiro Tada, Takanobu Tsuihiji, Hiroki Ishikawa, Noriyuki Wakimizu, Soichiro Kawabe, Kodai Sakane   +5 more
wiley   +1 more source

Amphibian Intestine Allometry. [PDF]

J Morphol
Duque-Correa MJ, Meloro C, Keller S, Cigler P, Wethli I, Niehaus J, Przybyło M, Clauss M.   +7 more
europepmc   +1 more source