Proechimys amphichoricus Moojen, 1948 . Univ. Kans. Pubi. Mus. Nat. Hist., 1:344.

TYPE LOCALITY: Venezuela, Amazonas, Cerro Duida, 325 m .

DISTRIBUTION: S Venezuela, adjacent Brazil.

COMMENTS: Subgenus Proechimys . Formerly included in semispinosus; see Reig et al. (1980). The chromosome no. is 2n=26; FN=44.