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 33. Geophis nigrocinctus Duellman Geophis nigrocinctus Duellman 1959 : 1 . Holotype . University of Michigan Museum of Zoology ( UMMZ ) 118841, male collected 18 June 1958 by J. Wellman. Type­locality. Dos Aguas, Michoacán, México , 2100 m elevation. Distribution. Known from the type locality, Sierra de Coalcoman, Michoacán, Mexico , and from the Sierra de Manantlán, Jalisco, Mexico , from 1900 m elevation. Species group. chalybeus ( Downs 1967 ) . Systematic references. Duellman (1959) , Downs (1967) . Remarks. Flores­Villela et al. (1995) recorded G. nigrocinctus from a pine forest in Jalisco, Mexico .