Catonyx cuvieri ( Lund, 1839 )

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 : 28

Catonyx cuvieri ( Lund, 1839)

Referred material: Right mf1, mf2, mf4, Mf1, Mf3, and left Mf1: PIMUZ A/ V 523.

Comment: PIMUZ A/V 523 corresponds to a specimen for which six isolated teeth were preserved. Tere is a weak trilobulation of Mf1 and a strong trilobulation of mf1 that suggest the reassignment of this specimen to Catonyx (see Corona et al., 2013). Mf3 from PIMUZ A/V 523 shows two strongly marked lobes with a thin connection between them, with the posterior having a straight distal elongation. Te mf4 of PIMUZ A/V 523, on the other hand, exhibits a less trilobated shape, and is more rounded than triangular. In agreement with the dental patterns depicted by Corona et al. (2013), all of these traits of the Mf3 and mf4 suggest a reassignment of PIMUZ A/V 523 to Ca. cuvieri . Tis species is considered as a ground sloth species living in humid habitats such as tropical and subtropical forests ( Miño-Boilini & Quiñones, 2020). Te presence of this species contrasts with the abundance of S. leptocephalum and indicates a likely complex environmental scenario of the Pampean Region.