Catonyx chiliensis ( Lydekker, 1886 )

Miño-Boilini, AR & Zurita, AE, 2015, Dimorphism in Quaternary Scelidotheriinae (Mammalia, Xenarthra, Phyllophaga), Palaeontologia Electronica (Basel, Switzerland) 736 (1), pp. 1-16 : 7

Catonyx chiliensis ( Lydekker, 1886)

( Figure 7.1-2 )

Referred material. BM(NH)M 2819, partial skull; SGO-PV 188, posterior portion of the skull; ROM 2089, partial skull, ROM 4572, partial skull; MHINUNSL-GEO V 199, partial skull in a good state of preservation, only preserving the right Mf1.

Description. In this taxon, the parasagittal crests start in the nuchal crest and end at the level of the postorbital process of the frontal, as in all Quaternary Scelidotheriinae . In some specimens (RON 4572 and BM(NH)M 2819), the sagittal crest is slightly developed at the level of the parietals, and the parasagittal crests differ at the level of the fronto-parietal suture ( Figure 7.1 ). In contrast, in other specimens (ROM 2089, SGO-PV 188, MHINUNSL-GEO V 199), the parasagittal crests fail to develop into a sagittal crest ( Figure 7.2 ).

Figures

FIGURE 7. Catonyx chiliensis. Skulls in dorsal view. 1, BM(NH)M 2819; 2, MHIN-UNSL-GEO V 199. Scale bar equals 10 mm.