Redescripción y designación de un neotipo de Panochthus tuberculatus (Owen) (Mammalia, Cingulata, Glyptodontidae)

Abstract

-REDESCRIPTION AND DESIGNATION OF A NEOTYPE OF PANOCHTHUS TUBERCULATUS (OWEN) (MAMMALIA, CINGULATA, GLYPTODONTIDAE). We design a neotype for Panochthus tuberculatus (Owen), given that the holotype is missing. A diagnosis and detailed description of the neotype is provided. Glyptodon tuberculatus is the type species of Panochthus Burmeister, one of the genera of giant Pleistocene glyptodonts. P. tuberculatus is recorded in the Bonaerean (late middle Pleistocene) and Lujanian (thus far only for the late Pleistocene lapse of this age) of Argentina, Uruguay, Brazil, Paraguay and, with doubts, Bolivia. Firstly, the species was recognized on the basis of two fragments of dorsal armor; this type material (two syntypes) must be considered as lost, given that it has not been found in the collections of British Museum Natural History, where it was deposited. It is essential that material assigned to P. tuberculatus be made available, to establish the validity of each of the 19 species referred to this genus. The selected material is the complete specimen MLP 16-29, from the Bonaerean of Tapalqué (Buenos Aires Province, Argentina). The specimen of P. tuberculatus MLP 16-29 fulfills all the conditions required by the International Code of Zoological Nomenclature and the designed neotype satisfies all the required subsections. The conclusions are: (i) the specimen MLP 16-29, consisting of nearly complete skeleton and armor of a glyptodontid, until now referred to P. morenoi, becomes the neotype of P. tuberculatus; and (ii) consequently, P. morenoi (sensu Ameghino, 1889), is a synonym of P. tuberculatus.

How Marine Isotope Stage 3 (MIS3) is reflected in northern Mesopotamia faunal assemblage of Argentina: The Xenarthra Cingulata case

“…These latter two species are interpreted as endemics of the Brazilian Intertropical Region (Zamorano, 2012;Zamorano and Brandoni, 2013;Porpino et al, 2014). With regards to the material analyzed here, most of the characters discussed, both in the caudal sheath and in the dorsal carapace, have been mentioned by Zamorano (2012), Zamorano et al (2012) and Castellanos (1942) as diagnostic features of Panochthus tuberculatus. More precisely, our species-level assignation is based both on the ornamentation pattern and morphology of the caudal sheath, and on the ornamentation of the carapace portions and non associated osteoderms that have been preserved.…”

“…Comments: According to Castellanos (1942), Cruz et al (2010), Zamorano (2012) and Zamorano et al (2012) the ornamentation of the carapace is very similar in all the species of Panochthus, so that usually neither osteoderms nor isolated carapace fragments can be used to achieve precise species-level determination. Description:…”

The Pleistocene Glyptodontidae Gray, 1869 (Xenarthra: Cingulata) of Colombia and some considerations about the South American Glyptodontinae

“…One particular intertropical Glyptodontidae, Hoplophorus Lund, 1839 seems to be restricted to about 20°S in the current territories of Brazil and Bolivia (see Hoffstetter, 1963;Paula-Couto, 1957;Porpino et al, 2010); Paula Couto (1983) reported Hoplophorus from the Acre region, Brazil, but the material (only one isolated osteoderm) has never been figured. Other taxa, the genus Panochthus Burmeister, 1866, had a wider geographic distribution, reaching probably from 49°S (Tauber & Palacios, 2007) to 5°S (Moreira, 1965;Porpino & Bergqvist, 2002;Porpino et al, 2004;Zamorano et al, 2012). The evidence suggests that Panochthus is a taxon with wide ecological tolerance, since its records come from arid/semiarid/cold (Carlini & Scillato-Yané, 1999) and wetter and warmer environments .…”

Los <i>Panochthini</i> (<i>Xenarthra, Glyptodontidae</i>): sistemática y evolución

“…En las publicaciones de los últimos años, en las que aparecen listas con las especies incluidas en la Tribu Panochthini, esta especie es considerada valida Zamorano & Scillato-Yané, 2006;Zurita et al, 2009a (Mones, 1986;Zamorano et al, 2012). Sobre dicho holotipo dice Ameghino (1877: 6): (Mones, 1986;Current, com.…”

“…En este Piso/Edad se registran varios panoctinos. Panochthus tuberculatus es frecuente; el material designado como neotipo proviene del Bonaerense de Tapal qué (Partido de Tapalqué, centro de la Provincia de Buenos Aires) (ver Zamorano et al, 2012); P. frenzelianus es más escaso que el anterior y para esta especie Ameghino menciona el "bonaerense" y el "belgranense" (vide supra).…”