Contribution to the Systematic of some Glyptodontidae (Xenarthra, Cingulata)

ZAMORANO, M.; ZURITA, A. E; SCILLATO-YANÉ, G. J.

La Rioja

Congreso; XXVI Jornadas Argentinas de Paleontología de vertebrados; 2013

APA

The Family Glyptodontidae Gray traditionally includes five subfamilies (i.e. Glyptatelinae Castellanos, Propalaehoplophorinae Ameghino, Doedicurinae Trouessart, Glyptodontinae Gray, and “Hoplophorinae” Huxley). Hoffstetter carried out this phylogenetic and taxonomic synthesis, which was accepted by most of authors. Since some years ago, this original proposal does not concord with modern contributions based on phylogenetical analyses, which recognize news lineages; in addition, several taxa usually interpreted as monophyletic are in fact no natural groups, such as “Hoplophorinae”. This subfamily was divided by Hoffstetter in seven tribes (Palaehoplophorini, “Plohophorini”, “Panochthini”, Lomaphorini, Neothocoraphorini, Neuryurini, and “Hoplophorini”) using as main diagnostic character the presence of a well developed caudal tube.  In this contribution we reaffirms, through a cladistic analysis incorporating all the species of the genus Neosclerocalyptus Paula Couto, the usage of the term Neosclerocalyptini to include Neosclerocalyptus. On the other hand, a phylogenetic analysis incorporating all the taxa that traditionally were included in the tribe Panochthini (Nopachthus Ameghino [two species], Propanochthus Castellanos [one species], and Panochthus Burmeister [seven species]) indicates the polyphyletic condition of “Panochthini” whereas Panochthus is a natural group, being Hoplophorus the sister taxa. Thereby, we propose the usage of Panochthini to include the genera Panochthus and Hoplophorus.