Results 51 to 60 of about 877 (172)

A new semi‐fossorial thescelosaurine dinosaur from the Cenomanian‐age Mussentuchit Member of the Cedar Mountain Formation, Utah

open access: yesThe Anatomical Record, Volume 307, Issue 12, Page 3717-3781, December 2024.
Abstract Thescelosaurines are a group of early diverging, ornithischian dinosaurs notable for their conservative bauplans and mosaic of primitive features. Although abundant within the latest Cretaceous ecosystems of North America, their record is poor to absent in earlier assemblages, leaving a large gap in our understanding of their evolution ...
Haviv M. Avrahami   +3 more
wiley   +1 more source

Turbinal bones are still one of the last frontiers of the tetrapod skull: hypotheses, challenges and perspectives

open access: yesBiological Reviews, Volume 99, Issue 6, Page 2304-2337, December 2024.
ABSTRACT Turbinals are bony or cartilaginous structures that are present in the nasal cavity of most tetrapods. They are involved in key functions such as olfaction, heat, and moisture conservation, as well as protection of the respiratory tract. Despite recent studies that challenged long‐standing hypotheses about their physiological and genomic ...
Quentin Martinez   +10 more
wiley   +1 more source

DICYNODONT JAW MECHANISMS RECONSIDERED: THE KANNEMEYERIA (ANOMODONTIA THERAPSIDA) MASTICATORY CYCLE

open access: yesPublicación Electrónica de la Asociación Paleontológica Argentina, 2015
The unique feature of the dicynodont masticatory apparatus is the double-convex jaw articulation, which permitted free antero-posterior movement. Since Crompton and Hotton's demonstration of the jaw articulation, most subsequent work has argued either ...
Alain J. Renaut
doaj  

A systematic comparative description of extant turtle humeri, with comments on humerus disparity and evolution based on fossil comparisons

open access: yesThe Anatomical Record, Volume 307, Issue 11, Page 3437-3505, November 2024.
Abstract The humerus is central for locomotion in turtles as quadrupedal animals. Osteological variation across testudine clades remains poorly documented. Here, we systematically describe the humerus anatomy for all major extant turtle clades based on 38 species representing the phylogenetic and ecological diversity of crown turtles.
Guilherme Hermanson   +3 more
wiley   +1 more source

The first biarmosuchian from the upper Madumabisa Mudstone Formation (Luangwa Basin) of Zambia [PDF]

open access: yes, 2015
This contribution reports the first occurrence of a biarmosuchian therapsid from the upper Madumabisa Mudstone Formation of the Luangwa Basin of northeastern Zambia.
Sidor, Christian A
core  

Evolution of the temporal skull openings in land vertebrates: A hypothetical framework on the basis of biomechanics

open access: yesThe Anatomical Record, Volume 307, Issue 4, Page 1559-1593, April 2024.
Abstract The complex constructions of land vertebrate skulls have inspired a number of functional analyses. In the present study, we provide a basic view on skull biomechanics and offer a framework for more general observations using advanced modeling approaches in the future.
Ingmar Werneburg, Holger Preuschoft
wiley   +1 more source

A new vertebrate biozone at the base of the Beaufort Group, Karoo sequence (South Africa) [PDF]

open access: yes, 1990
A new vertebrate biozone at the base of the Beaufort Group has been identified. This biozone is the oldest vertebrate biozone of the Beaufort Group and contains fossils of various therapsid genera which are more primitive than previously known related ...
Rubidge, Bruce S
core  

Reassessment of the enigmatic “Prestosuchus” loricatus (Archosauria: Pseudosuchia) from the Middle‐Late Triassic of southern Brazil

open access: yesThe Anatomical Record, Volume 307, Issue 4, Page 974-1000, April 2024.
Abstract Our knowledge of the diversity and evolution of South American Triassic pseudosuchians has greatly improved in the past 15 years, due to new discoveries, but also to the revision of several historically important specimens. One of the earliest descriptions of pseudosuchians from the Triassic of Brazil stems from the classic work of Huene from ...
Julia B. Desojo, Oliver W. M. Rauhut
wiley   +1 more source

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