Neofiber True, 1884 . Science, 4:34.

TYPE SPECIES: Neofiber alleni True, 1884 .

COMMENTS: A relictual form once more widespread in the eastern USA (see Frazier, 1977, and Hibbard and Dalquest, 1973). Although sometimes placed with Ondatra in the tribe Ondatrini (Chaline and Mein, 1979; Kretzoi, 1969; Repenning et al., 1990), a variety of morphological features conveys their very distant relationship (Carleton, 1981; Hooper and Hart, 1962; Koenigswald, 1980), as does fossil evidence (Martin, 1975; Zakrzewski, 1974). Alternatively, Neofiber either has been cited as Arvicolinae incertae sedis (Gromov and Polyakov, 1977; Koenigswald, 1980) or affiliated with Arvicola and Microtus in a broadly-defined tribe Arvicolini (Zagorodnyuk, 1990) .