Ichthyomys tweedii Anthony, 1921 . Am. Mus. Novit., 20:1.

TYPE LOCALITY: Ecuador, Prov. El Oro, Portovelo, 615 m .

DISTRIBUTION: W Ecuador and C Panama.

SYNONYMS: caurinus .

COMMENTS: Taxonomy and distribution reviewed by Voss (1988), who placed caurinus in full synonymy.