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

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

DISTRIBUTION: S. Venezuela; adjacent Brazil.

COMMENT: Formerly included in semispinosus; see Reig et al., 1980:291-312, in Voronstov and Van Brink, eds., Animal genetics and evolution, Junk, The Hague.