Skull anatomy and paleoneurology of a new traversodontid from the Middle-Late Triassic of Brazil.
Dinodontosaurus Assemblage Zone
Ladinian/Carnian
Traversodontidae
phylogeny
Journal
Anatomical record (Hoboken, N.J. : 2007)
ISSN: 1932-8494
Titre abrégé: Anat Rec (Hoboken)
Pays: United States
ID NLM: 101292775
Informations de publication
Date de publication:
Apr 2024
Apr 2024
Historique:
revised:
28
12
2023
received:
16
10
2023
accepted:
30
12
2023
medline:
18
3
2024
pubmed:
29
1
2024
entrez:
29
1
2024
Statut:
ppublish
Résumé
Traversodontidae, a clade of gomphodont cynodonts, thrived during the Middle and Late Triassic, displaying a wide geographical distribution. During fieldwork in 2009, a new specimen was discovered in Ladinian/early Carnian stratigraphic layers in southern Brazil. Here, we describe this specimen and propose a new taxon closely related to Traversodon stahleckeri (Traversodontinae) but displaying a unique combination of traits (e.g., presence of a poorly developed suborbital process, mesiodistal length of the paracanine fossa similar to the length of the canine, short diastema between the fourth incisor and the upper canine, and coronoid process not entirely covering the distalmost lower postcanine). Furthermore, the endocranial anatomy of the new taxon was examined. The reconstruction of the cranial endocast revealed paleoneurological features consistent with non-Gomphodontosuchinae traversodontids. These features include the presence of a pineal body (but the absence of an open parietal foramen). These recent findings contribute significantly to our understanding of the evolutionary history and cranial anatomy of Middle-Late Triassic traversodontids, shedding light on the diversity and adaptations of non-mammaliaform cynodonts.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
791-817Subventions
Organisme : Proyectos de Investigación Científica y Tecnológica
ID : 2020-SERIEA-01498
Organisme : Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul
ID : 21/2551-0002030-0
Organisme : Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul
ID : 21/2551-0000619-6
Organisme : Conselho Nacional de Desenvolvimento Científico e Tecnológico
ID : 422568/2018-0
Organisme : Conselho Nacional de Desenvolvimento Científico e Tecnológico
ID : 309414/2019-9
Organisme : Conselho Nacional de Desenvolvimento Científico e Tecnológico
ID : 309178/2022-3
Organisme : Conselho Nacional de Desenvolvimento Científico e Tecnológico
ID : 406902/2022-4
Informations de copyright
© 2024 American Association for Anatomy.
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