Crossomys moncktoni Thomas, 1907 . Ann. Mag. Nat. Hist., ser. 7, 20:71.

TYPE LOCALITY: New Guinea, NE Papua New Guinea, Central Prov., Brown River, Serigina, 4500 ft .

DISTRIBUTION: Papua New Guinea; known only from Papuan Central Cordillera and mountains on Huon Peninsula (see map in Flannery, 19906:191).

COMMENTS: Based on phallic morphology, Lidicker (1968) speculated that C. moncktoni is not closely related to Hydromys and its relatives. Flannery (1990b) provided photographs and summaries of distributional and biological information. Chromosomal data were reported by Donnellan (1987). Comparisons with Neotropical ichthyomyines made by Voss (1988).