Artículo
The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny
Chambi Trowell, Sofia A. V.; Martinelli, Agustín Guillermo
; Whiteside, David I.; Romo de Vivar Martínez, Paulo Rodrigo; Bento Soares, Marina; Schultz, Cesar; Gill, Pamela G.; Benton, Michael J.; Rayfield, Emily J.
Fecha de publicación:
11/2021
Editorial:
Taylor & Francis
Revista:
Journal of Systematic Palaeontology
ISSN:
1477-2019
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Rhynchocephalians are a group of lizard-like diapsid reptiles that were very diverse during the Mesozoic but are now restricted to a single extant genus in New Zealand. Recent cladistic analyses have revealed two major clades, Eusphenodontia and the more crownward Neosphenodontia, but relationships of individual taxa have remained difficult to determine because of missing data and an unrevised data matrix. Here we drastically revise the established data matrix on rhynchocephalians by reassessing, evaluating, and adding new characters and operational taxonomic units, differing from any previous analyses in our goal to consider all known rhynchocephalians. In addition, we describe a new genus and species of an early eusphenodontian taxon from the Norian of southern Brazil, with a unique mosaic of plesiomorphic and apomorphic traits, and we re-examine the craniodental anatomy of the eusphenodontian Clevosaurus brasiliensis with µCT imaging, revealing a unique form of acrodonty amongst rhynchocephalians.
Palabras clave:
CLADISTICS
,
CLEVOSAURUS
,
MORPHOLOGY
,
RHYNCHOCEPHALIA
,
SPHENODONTIA
,
TRIASSIC
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(MACNBR)
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Citación
Chambi Trowell, Sofia A. V.; Martinelli, Agustín Guillermo; Whiteside, David I.; Romo de Vivar Martínez, Paulo Rodrigo; Bento Soares, Marina; et al.; The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny; Taylor & Francis; Journal of Systematic Palaeontology; 19; 11; 11-2021; 787-820
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