A new species of Eutatus Gervais (Xenarthra, Dasypodidae) from the late Pleistocene of the Northern Pampean region, Argentina

Abstract

The genus Eutatus has been recently revised and only two species were recognized over detailed study of the characteristics of fixed osteoderms from the pelvic shield and other elements of postcranium: E. seguini, limited to the Bonaerian Stage/ Age and Lujanian Stage/Age, and E. pascuali, older than the latter, recognized in the Marplatan and Ensenadan Stage/Age. Here, we report a new species of Eutatini, Eutatus crispianii sp. nov., occurring in the Lujanian Stage/Age and described on the basis of the morphology of fixed osteoderms. Geometric morphometric analysis and statistical analysis of quantitative variables of these elements reveal significant differences between the new species and those previously reported.