Eutatus seguini Gervais, 1867

Verger, Kévin Le, 2023, Xenarthrans of the collection of Santiago Roth from the Pampean Region of Argentina (Pleistocene), in Zurich, Switzerland, Swiss Journal of Palaeontology (3) 142 (1), pp. 1-39 : 9

Eutatus seguini Gervais, 1867

Referred material: Anterior portion of the cranium bearing eight right molariforms and seven left molariforms, complete mandible bearing all teeth (broken), right humerus, right ulna, right radius, right hand, left fragmented ulna, left fragmented hand, and dorsal shield plates of osteoderms from the pelvic buckler: PIMUZ A/ V 415 ( Figs. 4 , 5 , 6 , 7 ); one large plate of osteoderms from the pelvic buckler: PIMUZ A/ V 420 ( Fig. 3 ).

Comment: Compared to specimens assigned to E. pascuali, PIMUZ A/V 415 and PIMUZ A/V 420 exhibit osteoderms with relatively smaller central figures and larger exposed surface foramina. In particular, some osteoderms exhibit only four hair foramina, which support the initial attribution to E. seguini ( Krmpotic et al., 2009) . E. seguini was the initial proposed attribution for these specimens (Schulthess, 1920) and the few available distinctive elements tend to confirm these initial assignments.

Figures

Fig. 4 Plate of crania belonging to the Cingulata from the Roth collection at PIMUZ.The most complete remains illustrated here correspond to the Eutatini and glyptodonts. Scale bar =10 cm

Fig. 5 Plate of the most complete postcranial remains of the forelimb from the Roth collection at PIMUZ and a ground sloth scapula. Among the Cingulata, the best represented clades are large-sized armadillos (Eutatini, Pampatheriinae) and glyptodonts. In the ground sloths, only the mylodonts are not represented here. Scale bar= 1 cm

Fig. 6 Plate of the most complete postcranial remains of the hindlimb from the Roth collection at PIMUZ and a glyptodont pelvic girdle. Among the Cingulata, the best represented clades are large-sized armadillos (Eutatini, Pampatheriinae) and glyptodonts. In the ground sloths, only the megatherines are not represented here. Scale bar= 1 cm

Fig. 7 Plate of the most complete postcranial remains for the hand and the foot from the Roth collection at PIMUZ.For the hand of the cingulates, only an Eutatini and a glyptodont are presented and for the ground sloths, a megatherine and a scelidothere are illustrated to show associated remains. For the foot, the collection is richer with an Eutatini, several glyptodonts, a mylodont and a scelidothere represented here. Scale bar=1 cm

Fig. 3 Plate of isolated or connected osteoderms for each species in the Roth collection at PIMUZ (from pelvic buckler,scapular buckler, or dorsal shield—see text). Almost all belong to the Cingulata, and the collection includes also osteoderms of Pilosa. Scale bar =1 cm