Leptomys signatus Tate and Archbold, 1938 . Am. Mus. Novit., 982:2.

TYPE LOCALITY: Papua New Guinea, Western Prov., Sturt Isl Camp, Fly River (N bank), near Fairfax Isis, sea level .

DISTRIBUTION: Known only from the type locality along lower Fly River; limits unknown.

COMMENTS: The diagnostic traits Tate and Archbold (1938) used to separate this species from the other two identify a lowland population of Leptomys that shows no morphological intergradation with samples of either L. elegans or L. ernstmayri . This species is still known only by the four examples in the type series.