Reithrodontomys megalotis hooperi Goodwin
Western Harvest Mouse
1954. Reithrodontomys megalotis hooperi Goodwin, Amer. Mus. Novit., 1660:1, May 25, type from Rancho del Cielo, 5 mi. NW Gómez Farías, 3500 ft., Tamaulipas.
Distribution in Tamaulipas.—Known only from type locality.
Reithrodontomys fulvescens
Fulvous Harvest Mouse
This is the most common species of Reithrodontomys in Tamaulipas; it occurs in almost all parts of the state, from sea level to high up in the mountains and from the tropical forest to the desert plain.
The three subspecies in the state are R. f. intermedias in the northern half, R. f. griseoflavus in the high parts of the Sierra Madre Oriental, and R. f. tropicalis in the southeast. The lines between these subspecies are difficult to establish because the zones of intergradation are broad. Characters for separating the three subspecies in Tamaulipas are listed by Hooper (1952).
Reithrodontomys fulvescens griseoflavus Merriam
1901. Reithrodontomys griseoflavus Merriam, Proc. Washington Acad. Sci., 3:553, November 29, type from Ameca, 4000 ft., Jalisco.
1952. Reithrodontomys fulvescens griseoflavus, Hooper, Miscl. Publ. Mus. Zool., Univ. Michigan, 77:98, January 16.