Pseudomys shortridgei (Thomas, 1907) . Proc. Zool. Soc. Lond., 1906:765 [1907].

TYPE LOCALITY: Australia, SW Western Australia, neighborhood of Woyerling Reserve, 973 ft (additional information in Mahoney and Richardson, 1988:180) .

DISTRIBUTION: Australia; SW Western Australia and SW Victoria (Grampian Mtns and Portland areas); see map in Watts and Aslin (1981:185).

STATUS: U.S. ESA - Endangered; IUCN - Vulnerable.

COMMENTS: Thought to be extinct in Western Australia (Watts and Aslin, 1981), but recently rediscovered there (Baynes et al., 1987). Electrophoretic data suggested P. shortridgei is phylogenetically isolated from all other species of Pseudomys (Baverstock et al., 1981); spermatozoal morphology unlike most other Pseudomys but similar to that of P. delicatulus, P. novaehollandiae, and P. pilligaensis (Breed, 1983); phallic anatomy linked P. shortridgei to P. albocinereus and P. fumeus, a group that could be generically recognized by calling it Gyomys (Lidicker and Brylski, 1987:635) .