DOAJ Open Access 2017

The Triassic eucynodont Candelariodon barberenai revisited and the early diversity of stem prozostrodontians

Agustín G. Martinelli Marina Bento Soares Téo Veiga De Oliveira Pablo G. Rodrigues Cesar L. Schultz

Abstrak

The dental anatomy of Candelariodon barberenai from the Dinodontosaurus Assemblage Zone (Pinheiros-Chiniquá Sequence, Santa Maria Supersequence, late Ladinian–early Carnian) of south Brazil, is redescribed. Candelariodon was originally classified as Eucynodontia incertae sedis and our analysis recovered this taxon deeply nested within Probainognathia, as the sister taxon of Potheriodon plus Prozostrodontia. The lower postcanine dentition of Candelariodon has several apomorphies shared with Prozostrodon, Santacruzgnathus, Brasilodon/Brasilitherium, and some basal mammaliaforms (Morganucodon, Megazostrodon), such as a lingual cingulum with discrete cusps e and g and two distinct morphologies in the tooth row. The reinterpretation of Candelariodon as a probainognatian cynodont more derived than Probainognathus and the rich Brazilian fossil record document an important adaptive radiation of non-mammaliaform prozostrodontians and closely related forms prior to the origin of the mammaliaform clade.

Topik & Kata Kunci

Fossil man. Human paleontology Paleontology

Penulis (5)

Agustín G. Martinelli

Marina Bento Soares

Téo Veiga De Oliveira

Pablo G. Rodrigues

Cesar L. Schultz

Format Sitasi

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Martinelli, A.G., Soares, M.B., Oliveira, T.V.D., Rodrigues, P.G., Schultz, C.L. (2017). The Triassic eucynodont Candelariodon barberenai revisited and the early diversity of stem prozostrodontians. https://doi.org/10.4202/app.00344.2017

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Informasi Jurnal

Tahun Terbit: 2017
Sumber Database: DOAJ
DOI: 10.4202/app.00344.2017
Akses: Open Access ✓