On the fossil Remains of Panochthus Burmeister, 1866 (Xenarthra, Cingulata, Glyptodontidae) from the Pleistocene of southern Brazil

FERREIRA J.D.; ZAMORANO M.; RIBEIRO A.M.

ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS.

ACAD BRASILEIRA DE CIENCIAS

Lugar: Rio de Janeiro; Año: 2015 vol. 71 p. 15 - 27

0001-3765

The genus Panochthus represents characterizes the last lineage of ?Panochthini? recorded in the Pleistocene. This genus has a wide latitudinal distribution in South America, and in Brazil occurs is distributed in the southern and northeastern regions. In this paper we describe new material (isolated osteoderms and caudal tube fragments) assigned to of the genus Panochthus from the state of Rio Grande do Sul (southern Brazil) and discuss some taxonomic issues related to Panochthus tuberculatus and Panochthus greslebini based on this material discuss the taxonomic aspects of P. tuberculatus, P. cf. P. greslebini and Panochthus sp. The record of P. cf. P. greslebini is occurrence of P. greslebini is the first for outside the Brazilian Intertropical Regionthe first for the Pleistocene of southern Brazil. In addition, we describe new diagnostic features to differentiate the osteoderms of P. greslebini and P. tuberculatus. Unfortunately, it was not possible to identify some osteoderms at the species level. Interestingly, they show four distinct morphotypes Some osteoderms were not possible to classify; they show four morphotypes, characterized by their external morphology, and thus are attributed to Panochthus sp. Finally, we conclude that besides P.tuberculatus registered to southern Brazil, there is another species of the genus assignable have classified asto P. cf. P. greslebini. Our analysis,, and reinforce the reliability of caudal tube characters for the importance of the classification of species of Panochthus.based on caudal tube.