Eobranisamys, Frailey and Campbell, 2004

Boivin, M, Marivaux, L, Orliac, MJ, Pujos, F, Salas-Gismondi, R, Tejada-Lara, JV & Antoine, P, 2017, Late middle Eocene caviomorph rodents from Contamana, Peruvian Amazonia, Palaeontologia Electronica 16 (7), pp. 1-50 : 5-6

Genus EOBRANISAMYS Frailey and Campbell, 2004

Type species. Eobranisamys romeropittmanae Frailey and Campbell, 2004 .

Species content. The type species mentioned above and Eobranisamys riverai Frailey and Campbell, 2004 ; Eobranisamys javierpradoi nov. sp. (this work).

Geographic and stratigraphic distribution. Contamana (CTA-27 and CTA-66 localities), Pozo Formation, lower member (late middle Eocene), Loreto department, Peru ; Santa Rosa ( LACM 6289 locality), “Yahuarango Formation” (?late Eocene/ early Oligocene), Ucayali department, Peru .

Emended generic diagnosis. Occlusal pattern similar to that of Branisamys by its tetralophodont and non-taeniodont lower molars; pentalophodont and taeniodont dP4s and upper molars with a strong third transverse crest and metaloph, which is lingually connected to the posteroloph. Eobranisamys differs from Branisamys in having a lower crown, thin loph(-id)s, and identifiable cusp(-id)s (modified after Frailey and Campbell, 2004, p. 79).