Microtus quasiater (Coues, 1874) . Proc. Acad. Nat. Sci. Philadelphia, 26:191.

TYPE LOCALITY: Mexico, Veracruz, Jalapa .

DISTRIBUTION: SE San Luis Potosi to N Oaxaca, Mexico.

COMMENTS: Subgenus Pitymys . Named as a variety of M. pinetorum but specific status affirmed thereafter (Bailey, 1900; Hall and Cockrum, 1953; Repenning, 1983). Typically viewed as most closely related to pinetorum in subgenus or genus Pitymys (Anderson, 1960; Hall and Cockrum, 1953; van der Meulen, 1978), a convention challenged by Repenning (1983) and Moore and Janecek (1990), who supported sister-group kinship between ochrogaster and quasiater .