Results 41 to 50 of about 2,363 (235)

The body plan of Halszkaraptor escuilliei (Dinosauria, Theropoda) is not a transitional form along the evolution of dromaeosaurid hypercarnivory [PDF]

open access: yesPeerJ, 2020
The dromaeosaurid theropod Halszkaraptor escuilliei is characterized by several unusual features absent in other paravians, part of which has been interpreted as diagnostic of a novel lineage adapted to a semiaquatic ecology. Recently, these evolutionary
Andrea Cau
doaj   +2 more sources

A large abelisaurid (Dinosauria, Theropoda) from Morocco and comments on the Cenomanian theropods from North Africa [PDF]

open access: yesPeerJ, 2016
We describe the partially preserved femur of a large-bodied theropod dinosaur from the Cenomanian “Kem Kem Compound Assemblage” (KKCA) of Morocco. The fossil is housed in the Museo Geologico e Paleontologico “Gaetano Giorgio Gemmellaro” in Palermo (Italy)
Alfio Alessandro Chiarenza, Andrea Cau
doaj   +2 more sources

The muscle-powered bite of Allosaurus (Dinosauria; Theropoda): an interpretation of cranio-dental morphology

open access: yesEstudios Geologicos, 2003
La morfología craneal de Allosaurus ha sido objeto de interpretaciones funcionales que implican un comportamiento depredador radicalmente distinto para el inferido para cualquier vertebrado depredador terrestre.
M. Antón   +3 more
doaj   +1 more source

Assesment and interpretation of negative forelimb allometry in the evolution of non-avian Theropoda

open access: yesFrontiers in Zoology, 2019
Background The origin of birds is marked by a significant decrease in body size along with an increase in relative forelimb size. However, before the evolution of flight, both traits may have already been related: It has been proposed that an ...
José A. Palma Liberona   +3 more
doaj   +1 more source

Cranial anatomy and stratigraphy of a new specimen of the tyrannosaurine dinosaur Daspletosaurus from the Judith River Formation of Central Montana, USA [PDF]

open access: yesActa Palaeontologica Polonica
The tyrannosaurine Daspletosaurus contains three recognized species from the Campanian of Montana and Alberta: Daspletosaurus torosus, Daspletosaurus wilsoni, and Daspletosaurus horneri. The recently named D. wilsoni has been proposed to represent a
ETHAN WARNER-COWGILL   +3 more
doaj   +1 more source

Diente de un gran dinosaurio terópodo (Allosauroidea) de la Formación Villar del Arzobispo (Titónico-Berriasiense) de Riodeva (España)

open access: yesEstudios Geologicos, 2009
Se describe un diente de dinosaurio terópodo de 98,3 mm de longitud apical hallado en el término municipal de Riodeva (Teruel). El diente ha sido localizado de forma aislada en un nivel de microconglomerados perteneciente a la Formación Villar del ...
R. Royo-Torres, A. Cobos, L. Alcalá
doaj   +1 more source

Taxonomic and stratigraphic update of the material historically attributed to Megalosaurus from Portugal [PDF]

open access: yesActa Palaeontologica Polonica
The first paleontological works on Mesozoic vertebrates from Portugal, carried out from the end of the 19th and the first half of the 20th century, provided the discovery of significant collections of vertebrate fossils.
Elisabete Malafaia   +4 more
doaj   +1 more source

A newly recognized theropod assemblage from the Lewisville Formation (Woodbine Group; Cenomanian) and its implications for understanding Late Cretaceous Appalachian terrestrial ecosystems [PDF]

open access: yesPeerJ, 2022
While the terrestrial fossil record of the mid-Cretaceous interval (Aptian to Cenomanian) in North America has been poorly studied, the recent focus on fossil localities from the western United States has offered a more detailed picture of vertebrate ...
Christopher R. Noto   +3 more
doaj   +2 more sources

The first ornithomimosaur remains from Germany [PDF]

open access: yesActa Palaeontologica Polonica
Ornithomimosauria is a group of coelurosaurs primarily known from the Cretaceous of Asia and North America. The European record is comparatively sparse, with Pelecanimimus from the Lower Cretaceous of Spain being the only unequivocal representative. Here,
Denis Theda   +3 more
doaj   +1 more source

Immature skulls of the theropod dinosaur Coelophysis bauri from Ghost Ranch, New Mexico [PDF]

open access: yesActa Palaeontologica Polonica
The theropod dinosaur Coelophysis bauri is well known from the famous Rhaetian, Late Triassic mass death assemblage from the Coelophysis Quarry at Ghost Ranch, New Mexico. This research describes the skulls of two small individuals of C. bauri.
Jeb E. Bugos, Skye N. McDavid
doaj   +1 more source

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