Results 41 to 50 of about 496 (122)

Diet of bird‐like troodontid dinosaurs: synthesis of a contentious clade

Biological Reviews, EarlyView.
ABSTRACT Troodontidae is a clade of small‐to medium‐sized maniraptoran theropods that mainly lived in Laurasia (modern Asia, North America and Europe) during the Jurassic and Cretaceous periods and are believed to have had a variety of diets. The uniqueness of troodontid teeth suggests that they diverged from the typical flesh‐based diet of non‐avian ...
Yui Chi Fan, Case Vincent Miller, Michael Pittman   +2 more
wiley   +1 more source

Theropod dinosaur diversity of the lower English Wealden: analysis of a tooth‐based fauna from the Wadhurst Clay Formation (Lower Cretaceous: Valanginian) via phylogenetic, discriminant and machine learning methods

Papers in Palaeontology, Volume 10, Issue 6, November/December 2024.
Abstract The Lower Cretaceous Wealden Supergroup of southern England yields a diverse assemblage of theropod dinosaurs, its taxa being represented by fragments in addition to some of the most informative associated skeletons of the European Mesozoic. Spinosaurids, neovenatorid allosauroids, tyrannosauroids and dromaeosaurids are among reported Wealden ...
Chris T. Barker, Lucy Handford, Darren Naish, Simon Wills, Christophe Hendrickx, Phil Hadland, Dave Brockhurst, Neil J. Gostling   +7 more
wiley   +1 more source

The osteology of Shaochilong maortuensis, a carcharodontosaurid (dinosauria:theropoda) from the Late Cretaceous of Asia [PDF]

, 2010
Large-bodied theropod dinosaurs from the Early-mid Cretaceous of the northern continents (Laurasia) are poorly known. One of the most complete and intriguing theropods from this interval is Shaochilong maortuensis Hu, 1964 from the Turonian (<92 Ma ...
Benson, R.B.J., Brusatte, S.L., Chure, D.J., Xu, X.   +3 more
core   +1 more source

Reconstruction of the pelvic girdle and hindlimb musculature of the early tetanurans Piatnitzkysauridae (Theropoda, Megalosauroidea)

Journal of Anatomy, Volume 244, Issue 4, Page 557-593, April 2024.
Piatnitzkysauridae were Jurassic theropods that represented one of the earliest lineages to have evolved moderate body size. Here, we reconstructed the hindlimb musculature of this clade, allowing a more complete understanding of myological evolution in theropod pelvic appendages. Abstract Piatnitzkysauridae were Jurassic theropods that represented the
Mauro B. S. Lacerda, Jonathas S. Bittencourt, John R. Hutchinson   +2 more
wiley   +1 more source

Feather development genes and associated regulatory innovation predate the origin of Dinosauria [PDF]

, 2014
The evolution of avian feathers have recently been illuminated by fossils and the identification of genes involved in feather patterning and morphogenesis. However, molecular studies have focused mainly on protein-coding genes. Using comparative genomics
Baker, Allan J., Clarke, Julia A., Edwards, Scott V., Haussler, D., Lowe, Craig B.   +4 more
core   +1 more source

A survey of dinosaur diversity by clade, age, place of discovery and year of description [PDF]

, 2014
Dinosaur diversity is analyzed in terms of the number of valid genera within each major clade, Mesozoic age, place of discovery and year of description. Aves (Archaeopteryx + Neornithes) is excluded. Nomina nuda and nomina dubia are not counted.
Taylor, Michael
core   +3 more sources

Comments on the morphology of basal paravian shoulder girdle: New data based on unenlagiid Theropods and Paleognath birds [PDF]

, 2021
In 1976 John Ostrom published an enlightening paper about the anatomical transformations in the shoulder girdle and forelimb elements along the origin of birds.
Agnolin, Federico, Brissón Egli, Federico, Lo Coco, Gastón Ernesto, Motta, Matias Javier, Novas, Fernando Emilio, Rozadilla, Sebastian   +5 more
core   +1 more source

Two early Cretaceous fossils document transitional stages in Alvarezsaurian dinosaur evolution [PDF]

, 2018
Highly specialized animals are often difficult to place phylogenetically. The Late Cretaceous members of Alvarezsauria represent such an example, having been posited as members of various theropod lineages, including birds [1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
Benson, Roger, Choiniere, J, Clark, J, Han, F, He, Y, Ma, Q, Sullivan, C, Tan, L, Tan, Q, Wang, S, Xing, H, Xu, X, Zhao, Q   +12 more
core   +2 more sources

Late Cretaceous continental and marine vertebrate assemblages of the Laño Quarry (Basque-Cantabrian Region, Iberian Peninsula): an update [PDF]

The vertebrate-bearing beds of the Laño quarry (Condado de Treviño) are among the most relevant sites from the Late Cretaceous of Europe. Geologically, Laño and the adjacent region are set on the southern limb of the South-Cantabrian Synclinorium (SE ...
Astibia, H., Badiola, A., Bardet, N., Berreteaga, A., Buffetaut, E., Buscalioni, A.D., Cappetta, H., Cavin, L., Corral, J.C., Díez Díaz, V., Gheerbrant, E., Murelaga, X., Ortega, F., Pereda-Suberbiol, X., Poyato-Ariza, F., Pérez-García, A., Rage, J.-C., Sanz, J.L., Torices, A.   +18 more
core   +2 more sources

The Origin of the Modern Bird Skull, with a Focus on the Evolution and Embryonic Development of Musculoskeletal Structures in the Temporal and Otic Regions [PDF]

, 2022
Compared with their Mesozoic theropod ancestors, extant birds (Aves) exhibit extensively modified skulls and associated soft tissue, with massively enlarged brains and reduced temporal musculature, an inner ear with dorsally elongated semicircular canals,
Hanson, Michael
core