A checklist and key to the snakes of the genus Geophis (Squamata: Colubridae: Dipsadinae), with commentary on distribution and conservation Author Wilson, Larry David Author Townsend, Josiah H. text Zootaxa 2007 1395 1 31 journal article 10.5281/zenodo.273681 1414766b-1cb5-4fdb-be42-306fac45815d 1175­5326 273681 21. Geophis incomptus Duellman Geophis incomptus Duellman 1959 : 3 . Holotype . University of Michigan Museum of Zoology ( UMMZ ) 118840, adult male collected 18 July 1958 by W.E. Duellman and J. Wellman. Type­locality. Dos Aguas, 2100 m elevation, Michoacán, México . Distribution. Known only from the type locality, Sierra de Coalcoman, Michoacan, Mexico . Species group. omiltemanus ( Downs 1967 ) . Systematic references. Duellman (1959) , Downs (1967) .