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Abstract:

Argentoconodon fariasorum is the only triconodont from the Jurassic of South America. Originally described on the basis of an upper molariform, A. fariasorum is now known by several specimens, including one that preserves most of its dentition, upper and lower jaws, and several postcranial elements. Close anatomical similarity exists between Argentoconodon fariasorum, Ichthyoconodon jaworowskorum, from the Cretaceous of Morocco, and the likely Jurassic Volaticotherium antiquus, from China. The results of a phylogenetic analysis including most taxa relevant to addressing triconodont phylogenetic relationships show Argentoconodon and Volaticotherium as a clade, which in turn is more closely related to Ichthyoconodon than to any other taxon. Our most parsimonious hypotheses support a triconodontid ancestry for Argentoconodon, Ichthyoconodon, and Volaticotherium as members of the monophyletic traditional subfamily Alticonodontinae. The inclusion of Argentoconodon among alticonodontines extends the geographical and temporal distribution of this triconodont subfamily to the South American Early Jurassic, resulting in extensive ghost lineages for many triconodontid groups. Postcranial similarities between Argentoconodon and Volaticotherium make it possible that the Argentinean taxon might have had gliding capabilities; if this is the case, our cladistic analysis highlights the possible existence of a gliding clade of triconodonts of wide distribution from at least as early as the Early Jurassic. © 2011 by the Society of Vertebrate Paleontology.

Registro:

Documento: Artículo
Título:New materials of Argentoconodon fariasorum (Mammaliaformes, Triconodontidae) from the Jurassic of Argentina and its bearing on triconodont phylogeny
Autor:Gaetano, L.C.; Rougier, G.W.
Filiación:IDEAN, Departamento de Ciencias Geológicas, Ciudad Autónoma de Buenos Aires, C1428EGA, Argentina
Department of Anatomical Sciences and Neurobiology, University of Louisville, 500 S. Preston Street, Louisville, KY 40292, United States
Palabras clave:body shape; body size; hypothesis testing; Jurassic; mammal; morphology; paleontology; parsimony analysis; phylogeny; spatial distribution; taxonomy; Argentina; Mammaliaformes
Año:2011
Volumen:31
Número:4
Página de inicio:829
Página de fin:843
DOI: http://dx.doi.org/10.1080/02724634.2011.589877
Título revista:Journal of Vertebrate Paleontology
Título revista abreviado:J. Vertebr. Paleontol.
ISSN:02724634
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02724634_v31_n4_p829_Gaetano

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Citas:

---------- APA ----------
Gaetano, L.C. & Rougier, G.W. (2011) . New materials of Argentoconodon fariasorum (Mammaliaformes, Triconodontidae) from the Jurassic of Argentina and its bearing on triconodont phylogeny. Journal of Vertebrate Paleontology, 31(4), 829-843.
http://dx.doi.org/10.1080/02724634.2011.589877
---------- CHICAGO ----------
Gaetano, L.C., Rougier, G.W. "New materials of Argentoconodon fariasorum (Mammaliaformes, Triconodontidae) from the Jurassic of Argentina and its bearing on triconodont phylogeny" . Journal of Vertebrate Paleontology 31, no. 4 (2011) : 829-843.
http://dx.doi.org/10.1080/02724634.2011.589877
---------- MLA ----------
Gaetano, L.C., Rougier, G.W. "New materials of Argentoconodon fariasorum (Mammaliaformes, Triconodontidae) from the Jurassic of Argentina and its bearing on triconodont phylogeny" . Journal of Vertebrate Paleontology, vol. 31, no. 4, 2011, pp. 829-843.
http://dx.doi.org/10.1080/02724634.2011.589877
---------- VANCOUVER ----------
Gaetano, L.C., Rougier, G.W. New materials of Argentoconodon fariasorum (Mammaliaformes, Triconodontidae) from the Jurassic of Argentina and its bearing on triconodont phylogeny. J. Vertebr. Paleontol. 2011;31(4):829-843.
http://dx.doi.org/10.1080/02724634.2011.589877