Pseudomys nanus (Gould, 1858) . Proc. Zool. Soc. Lond., 1858:242.

TYPE LOCALITY: Australia, Western Australia, Victoria Plains (see Mahoney and Richardson, 1988:177) .

DISTRIBUTION: Australia; W coast of Western Australia (also Barrow Isl), between Port Hedland and the Barkly Tableland in NE Western Australia, N Northern Territory, and NW Queensland (also South-West Isl in Gulf of Carpentaria); see map in Watts and Aslin (1981:177).

SYNONYMS: ferculinus .

COMMENTS: A close relative of P. gracilicaudatus to the exclusion of other species of Pseudomys, judged by analyses of electrophoretic data (Baverstock et al., 1977 a, 1981); but a member of the group that includes only P. australis, P. gouldii, and P. higginsi, a conclusion based on phallic morphology (Lidicker and Brylski, 1987); but not a distinctive relative to most other species in the genus as judged by spermatozoal form (Breed, 1983).