New information on the mandibular anatomy of Agudotherium gassenae, a Late Triassic non-mammaliaform probainognathian from Brazil.
Anat Rec (Hoboken)
; 307(4): 1515-1523, 2024 Apr.
Article
em En
| MEDLINE
| ID: mdl-37767852
ABSTRACT
Agudotherium gassenae is a poorly known non-mammaliaform probainognathian cynodont from the Late Triassic of southern Brazil. It is known only by mandibular remains, and its affinities within Probainognathia are unclear. Furthermore, its phylogenetic affinities were never investigated through computational analyses. In this study, we described new lower jaw remains excavated from the type locality and performed the first phylogenetic investigation of this taxon. The new specimen provides further anatomical information. The rostral region of the lower jaw was poorly preserved in the type series, leading to the interpretation that A. gassenae had three lower incisors. The new specimen demonstrates the presence of four incisors. The phylogenetic analysis positioned A. gassenae as the sister group of Prozostrodontia. This hypothesis differs from that previously presented in the former description of the taxon, in which it was considered a non-mammaliaform prozostrodont by means of character-state comparisons.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fósseis
/
Mandíbula
País como assunto:
America do sul
/
Brasil
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article