Cachiyacuy, Antoine et al., 2012

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 : 19

Genus CACHIYACUY Antoine et al., 2012

Type species. Cachiyacuy contamanensis Antoine et al., 2012 .

Species content. The type species and Cachiyacuy kummeli Antoine et al., 2012 ; Cachiyacuy cf. contamanensis , morph 1 (this work); Cachiyacuy cf. contamanensis , morph 2 (this work); Cachiyacuy cf. kummeli (this work).

Geographic and stratigraphic distribution. Contamana CTA-51, CTA-27, and CTA-29; Pozo Formation, lower member (late middle Eocene); Loreto Department, Peru.

Diagnosis sensu Antoine et al. (2012, p. 1320– 1321). Rodents characterized by brachydont and bunolophodont teeth. Upper molars are pentalophodont with strong mesolophule and distinct and long metaloph. Differs from Eobranisamys , Branisamys , Eosallamys , Sallamys , Eoespina , and Draconomys in showing a long metaloph not backwardly directed and connected to the posteroloph, but transverse and without lingual connection. Accessory, thin and short enamel crests may connect the metaloph either to the posteroloph or/and to the mesolophule. Differs from Eobranisamys , Branisamys , and Canaanimys in the absence of taeniodont pattern on upper teeth due to the presence of a strong lingual protoloph. Differs from Eoincamys and Incamys in having brachydont instead of hypsodont teeth, pentalophodont instead of tetralophodont upper molars, thinner and transverse instead of strong and oblique crests, and in the absence of a taeniodont pattern on both upper and lower teeth (i.e., lingual protoloph and anterior arm of hypoconid lacking).