Results 151 to 160 of about 385,447 (302)

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

Harvestmen (Arachnida: Opiliones) as Overlooked Predators of Anurans in the Neotropics. [PDF]

Ecol Evol
Calvache E, Villarreal O, Ávila-Rojas C, Bentley AG, Brito K, Correa-Zanotti C, Gutiérrez-Arboleda M, Iñiguez K, Narváez JC, Proaño L, Reyes-Vizcaíno M, García LF.   +11 more
europepmc   +1 more source

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

The Anatomical Record, EarlyView.
Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro, Marco Aurélio Gallo de França   +1 more
wiley   +1 more source

A cross-site comparison reveals limited geographic variation in risk avoidance of snowshoe hares. [PDF]

Ecology
Shiratsuru S, Studd EK, Peers MJL, Majchrzak YN, Kenney AJ, Murray DL, Romanski M, Belant JL, Boone HM, Boutin S, Pauli JN.   +10 more
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

A predator-prey model with age-structured role reversal. [PDF]

J Math Biol
Suarez LC, Cameron MK, Fagan WF, Levy D.
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

Multidimensional coevolution drives predator coexistence. [PDF]

Sci Rep
Mougi A.
europepmc   +1 more source

Inter‐ and intraspecific variation in theropod dinosaur dental microwear and its palaeoecological implications

The Anatomical Record, EarlyView.
Abstract Differences in skull and tooth morphology, stomach contents, and estimated bite force between medium‐to‐large sized (≥100 kg) predatory theropod dinosaurs have long been suspected to correlate with differences in their diets and dietary guilds (e.g., hypercarnivory, piscivory).
Cassius Morrison, James Gregory, Christopher Jackson, Jordan Bestwick, Katlin Schroeder, Samuel J.L. Gascoigne, Paul Bills, Laura B. Porro, Philip D. Mannion, Paul M. Barrett   +9 more
wiley   +1 more source

Effects of a native avian predator (weka; Gallirallus australis) and colony density on breeding success of a burrow-nesting seabird (tītī; Ardenna grisea). [PDF]

PLoS One
Carpenter JK, Fletcher D, Arbuckle J, Coleman M, Goodsell B, Gormley A, Metzger A, Moss T, Orwin KH, Rakiura Tītī Islands Administering Body, Rakiura Tītī Committee, Scott D, Sutton L, Thompson TDW, Timoti P, Whitehead A, Lyver PO.   +16 more
europepmc   +1 more source