Geophis isthmicus (Boulenger)

Wilson, Larry David & Townsend, Josiah H., 2007, A checklist and key to the snakes of the genus Geophis (Squamata: Colubridae: Dipsadinae), with commentary on distribution and conservation, Zootaxa 1395, pp. 1-31 : 11-12

22. Geophis isthmicus (Boulenger)

Atractus isthmicus Boulenger 1894: 307 . Rabdosoma zebrinum: Bocourt 1883: 539 . Rhegnops zebrinus: Cope 1885b: 178 . Geophis zebrina: Gunther 1893: 94 .

Geophis isthmicus: Dunn 1928: 1 .

Atractus zebrinus: Amaral 1929: 190 .

Holotype. Museum National d’Histoire Naturelle, Paris ( MNHN) 1984, a juvenile female. Type­locality. “Tehuantepec ( Mexique occidental).”

Distribution. Unknown, only known from a single specimen from the imprecise type locality. Species group. omiltemanus ( Downs 1967) .

Systematic references. Bocourt (1883), Boulenger (1894), Dunn (1928), and Downs (1967). Remarks. Downs (1967: 122) remarked “the generic allocation of this species remains tentative; it does,

however, bear at least superficial resemblances to the members of the omiltemanus group.”