Pampatherium Gervais & Ameghino, 1880

Pampatherium Gervais & Ameghino, 1880 Pampatherium humboldtii Lund, 1839

Referred material: Right tibia, fibula, humerus, radius, 11 osteoderms of the scapular or the pelvic buckler and one osteoderm of the mobile bands of the dorsal shield: PIMUZ A/ V 428 ( Figs. 3 View Fig , 5 View Fig , 6 View Fig ); five osteoderms of the scapular or pelvic buckler: PIMUZ A/ V 430.

Comment: All pampatheres in Roth collection at PIMUZ were originally assigned to the species Chalmydotherium typum Gervais & Ameghino, 1880 . From the original description of the species Pampatherium typum Gervais & Ameghino, 1880 , the use of the genus Pampatherium or Chlamydotherium Bronn, 1838 , was much debated and remained unresolved for a long time. Since Ameghino (1891) synonymed Chlamydotherium with Pampatherium , several authors persisted in using Chlamydotherium without discussing the taxonomic validity of the genus (e.g., Winge, 1915). Nowadays, however, the validity of Pampatherium is no longer debated (Ferreira et al., 2018). From the Pampean region, according to Ferreira et al. (2018), four pampatheriine species have been described: Holmesina paulacoutoi Cartelle & Bohórquez, 1984 , Pa. humboldtii , Pa. typum and Tonnicinctus mirus Góis et al., 2015 . Identification of PIMUZ A/V 428 and PIMUZ A/V 430 represented by at least one fixed scapular or pelvic buckler osteoderm is based on Góis et al. (2015). Tese osteoderms differ in their general shape, rather pentagonal or hexagonal for the scapular buckler, and rather quadrangular for the pelvic buckler ( Góis et al., 2015). Pampatherium differs from the other two genera by a narrower and less robust lateral and anterior margin, narrower anterior foramina, a less salient marginal elevation, and a shallower longitudinal depression ( Góis et al., 2015). PIMUZ A/V 428 and PMIUZ A/V 430 are best assigned to Pampatherium as they show a well-defined non-smooth central figure as in Pa. humboldtii ( Oliveira & Pereira, 2009) . I therefore propose to reassign PIMUZ A/V 428 and PIMUZ A/V 430 to Pa. humboldtii . While the cranial and endocranial material is relatively well-studied for this species (e.g., Ferreira et al., 2018; Tambusso & Fariña, 2015a), the postcranial remains are poorly known. PIMUZ A/V 428 offers the opportunity to analyze several complete long bones of Pa. humboldtii . For instance, the addition of transitional size species between extant armadillos and glyptodonts, such as pampatheres, could be relevant to address issues concerning humeral shape and digging abilities in Cingulata (e.g., Milne et al., 2009).