Pappogeomys Merriam, 1895 . N. Am. Fauna, 8:145.

TYPE SPECIES: Geomys bulleri Thomas, 1892 .

SYNONYMS: Cratogeomys Merriam, Platygeomys Merriam.

COMMENTS: Hooper (1946) included Platygeomys within Pappogeomys . Cratogeomys was recognized by Russell (1968a, b) as a valid subgenus, a position followed by Hall (1981). Honeycutt and Williams (1982), based on a phylogenetic analysis of allozyme data, retained alcorni and bulleri in Pappogeomys, but considered Cratogeomys generically distinct, containing the remaining species listed by Russell. Lee and Baker (1987), Davidow-Henry et al. (1989), and Hollander (1990) followed Honeycutt and Williams in considering Cratogeomys a distinct genus. Available data (Russell, 1968a, b; Honeycutt and Williams, 1982) support a sister-taxon relationship between Pappogeomys and Cratogeomys, but it remains a matter of personal opinion as to recognition status at the generic or subgeneric levels. Revision by Nelson and Goldman (1934; Cratogeomys only) and Russell (1968b).