Los laelapidos Androlaelaps geomys en Mexico se han registrado sobre la tuza (Pappogeomys) (Bassols, 1981), tambien se ha registrado un solo ejemplar sobre Peromyscus y Neotoma, aunque Strandtmann (1949) los considera accidentales.
Some synapomorphic or possible synapomorphic species did not allow proper identification of areas of endemism: Ammospermophilus harrisii, Corynorhinus mexicanus, Dermanura watsoni, Dasyprocta mexicana, Geomys tropicalis, Megadontomys thomasi, Phyllostomus stenops, Sorex macrodon, Tapirus bairdii, and Zygogeomys trichopus.
Specifically the distributional patterns of the plains pocket gopher (Geomys bursarius) and yellow-faced pocket gopher (Cratogeomys castanops) have received much attention where the geographic ranges of these species overlap primarily in portions of New Mexico, Colorado, and Kansas (Hall, 1981).
Baird's pocket gopher (Geomys breviceps) occurs from eastern Louisiana and Arkansas westward into central Texas and Oklahoma (Sulentich et al., 1991) and is the only species of pocket gopher that occurs in Louisiana (Lowery, 1974).