Astegotherium, Tejedor & Goin & Gelfo & López & Bond & Carlini & Scillato-Yané & Woodburne & Chornogubsky & Aragón & Reguero & Czaplewski & Vincon & Martin & Ciancio, 2009

Tejedor, Marcelo F., Goin, Francisco J., Gelfo, Javier N., López, Guillermo, Bond, Mariano, Carlini, Alfredo A., Scillato-Yané, Gustavo J., Woodburne, Michael O., Chornogubsky, Laura, Aragón, Eugenio, Reguero, Marcelo A., Czaplewski, Nicholas J., Vincon, Sergio, Martin, Gabriel M. & Ciancio, Martín R., 2009, New Early Eocene Mammalian Fauna from Western Patagonia, Argentina, American Museum Novitates 3638, pp. 1-43 : 18

Astegotherium , sp. nov.

Figure 5E

Several isolated plates from Laguna Fría are assigned to this new taxon. This small dasypodid is of similar size to the living Dasypus hybridus or D. septencinctus , with very thin and smooth osteoderms, and a lageniform central figure in the movable scutes, as in A. dichotomus , from the Casamayoran (Vacan, Carlini et al. 2002c); very few (or no) foramina surrounding the central figure; poorly defined sulcus separating the central figure from the peripheral ones. The central keel of the exposed surface is even less elevated than in the Casamayoran species, and has one or rarely two large foramina on the posterior margin.

Genus Stegosimpsonia Vizcaíno, 1994

Figures

Fig. 5. Dasypodidae from Laguna Fría (LF) and La Barda (LB) assemblages. A, scutes of Riostegotherium sp. nov. from LF; B, scutes of Riostegotherium sp. nov. from LB; C, scutes of Prostegotherium cf. astrifer from LF; D, scutes of Prostegotherium cf. astrifer from LB; E, scutes of Astegotherium sp. nov. from LF; F, scutes of Stegosimpsonia sp. nov. from LF (also in LB, but not shown). Scale bar 5 10 mm.