Results 101 to 110 of about 4,308 (203)

The dentition of tyrannosauroid theropods: a review

open access: yesDiscover Geoscience
Tyrannosauroidea is a clade of early-diverging carnivorous coelurosaur theropods known from the Middle Jurassic to Late Cretaceous that includes the eponymous Tyrannosaurus rex and its closest relatives. One of the most notable diagnostic features of the
Carlos A. Hernández-Luna   +3 more
doaj   +1 more source

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

open access: yes, 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.   +3 more
core   +1 more source

Several occurrences of osteomyelitis in dinosaurs from a site in the Bauru Group, Cretaceous of Southeast Brazil

open access: yesThe Anatomical Record, Volume 309, Issue 3, Page 642-648, March 2026.
Abstract This study investigates the occurrence of osteomyelitis in non‐avian dinosaurs, focusing on the Ibirá locality, a site with a high incidence of this pathological condition. We analyzed six new osteopathic sauropod specimens from the Upper Cretaceous of Brazil.
Tito Aureliano   +3 more
wiley   +1 more source

Phylogeny of Allosauroidea (Dinosauria:Theropoda): Comparative analysis and resolution [PDF]

open access: yes, 2008
Allosauroidea, a clade of large-bodied theropod dinosaurs that ranged from the Middle Jurassic until the Late Cretaceous, has been the subject of extensive phylogenetic study.
Brusatte, S.L., Sereno, P.C.
core   +1 more source

Braincase anatomy and palaeoneurology of Venetoraptor gassenae, a lagerpetid pterosauromorph from the Late Triassic of southern Brazil

open access: yesPalaeontology, Volume 69, Issue 2, March/April 2026.
Abstract There is a growing consensus that pterosaurs and the flightless Lagerpetidae are closely related. This relationship is supported by apomorphies throughout the skeleton, including endocranial character states such as a well‐developed floccular fossa and a tall anterior semicircular canal. Our knowledge of lagerpetid anatomy has been improved by
Lísie V.S. Damke   +6 more
wiley   +1 more source

Basal paravian functional anatomy illuminated by high-detail body outline [PDF]

open access: yes, 2017
Body shape is a fundamental expression of organismal biology, but its quantitative reconstruction in fossil vertebrates is rare. Due to the absence of fossilized soft tissue evidence, the functional consequences of basal paravian body shape and its ...
Falk, AR   +6 more
core   +1 more source

Evidence for avian intrathoracic air sacs in a new predatory dinosaur from Argentina.

open access: yesPLoS ONE, 2008
BackgroundLiving birds possess a unique heterogeneous pulmonary system composed of a rigid, dorsally-anchored lung and several compliant air sacs that operate as bellows, driving inspired air through the lung.
Paul C Sereno   +5 more
doaj   +1 more source

An Antarctic cretaceous theropod [PDF]

open access: yes, 1996
Fil: Brandoni de Gasparini, Zulma Nélida. División Paleontología Vertebrados. Facultad de Ciencias Naturales y Museo.
Molnar, R.E.   +2 more
openaire  

A NEW DINOSAUR TRACKSITE IN THE LATE ALBIAN OF ISTRIA, CROATIA

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2007
A new site with dinosaur footprints has been found in the upper Albian sediments of Istria, Croatia. The site was discovered near the city of Pula, at the Zlatne Stijene locality.
ALEKSANDAR MEZGA   +3 more
doaj   +1 more source

Unenlagiid theropods: are they members of the Dromaeosauridae (Theropoda, Maniraptora)?

open access: yesAnais da Academia Brasileira de Ciências, 2011
In the present paper we analyze the phylogenetic position of the derived Gondwanan theropod clade Unenlagiidae. Although this group has been frequently considered as deeply nested within Deinonychosauria and Dromaeosauridae, most of the features ...
Federico L. Agnolin, Fernando E. Novas
doaj   +1 more source

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