Abstract

BRAVO-CUEVAS, Víctor M.; ORTIZ-CABALLERO, Elizabeth  and  CABRAL-PERDOMO, Miguel Ángel. Late Pleistocene (Rancholabrean) Glyptodonts (Xenarthra, Glyptodontidae) from Hidalgo, Central Mexico. Bol. Soc. Geol. Mex [online]. 2009, vol.61, n.2, pp.267-276. ISSN 1405-3322.

An important sample of Glyptodontidae remains was recovered from the south-central region of the State of Hidalgo. The fossil material was recovered from aftuviolacustrine unnamed sedimentary sequence that consists of poorly to moderate consolidated clays, silts, and gravels; the specimens are associated with remains of bison (Bison), which indicates a Rancholabrean Land Mammal Age. The sample includes two carapace fragments and 10 isolate osteoderms. The osteoderms are typical hexagonal with two to five pilose follicles, the central figure is polygonal, concave and slightly raised; there are eight to nine peripheral figures, smaller in size, roughly trapezoidal in shape, and symmetrically arranged around the center. All of these features are comparable to the rosette pattern of Glyptotherium floridanum. thus the specimens from Hidalgo are assigned to this species. In Mexico, the genus Glyptotherium is known from Sonora, Chihuahua, Aguascalientes, Jalisco, Estado de Mexico, and Veracruz. The presence of this taxon in Hidalgo is formally reported and is added to previously known record of North American glyptodonts, extending its distribution range to what is now part of central Mexico.

Keywords : Xenarthra; Glyptodontidae; late Pleistocene; Central Mexico.

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