Mexistenasellus is a genus of isopod crustaceans in the family Stenasellidae. It contains 6 species, of which 4 are listed as endangered or vulnerable on the IUCN Red List. \n* Mexistenasellus coahuila Cole & Minckley, 1972 – EN \n* Mexistenasellus colei Bowman, 1982 \n* Mexistenasellus magniezi Argano, 1973 \n* Mexistenasellus nulemex Bowman, 1982 – VU \n* Mexistenasellus parzefalli Magniez, 1972 – VU \n* Mexistenasellus wilkensi Magniez, 1972 – VU Mexistenasellus coahuila lives in the United States and Mexico; all other species are endemic to Mexico.