Geophis nigroalbus, BOULENGER, 1908

Savage, Jay M. & Watling, James I., 2008, Not so rare snakes: a revision of the Geophis sieboldi group (Colubridae: Dipsadinae) in lower Central America and Colombia, Zoological Journal of the Linnean Society 153 (3), pp. 561-599 : 584

GEOPHIS NIGROALBUS BOULENGER, 1908

Geophis nigroalbus Boulenger, 1908: 552 (Type locality: Colombia: Valle del Cauca: Pavas, 3°41′N, 76°35′W, 1350 m; Holotype BMNH 1946.1.6.50, a juvenile male); Restrepo & Wright, 1987: 195; Myers, 2003: 33, figs 15–17.

Diagnostics: Distinguished from other species in the Geophis brachycephalus complex by the following combination of characters: (1) ventrals 134–143.5 ± 3.8–149 in males, 141–148.0 ± 5.2–157 in females; subcaudals 42–46.3 ± 2.1–51 in males, 37–41.3 ± 2.8–46 in females; total segmentals 180–190.0 ± 3.6– 197 in males, 181–189.3 ± 7.5–203 in females; (2) upper surfaces of body and tail uniform black; (3) hemipenis slightly bilobed with a long, slender capitulum about 3 times length of truncus (Myers, 2003).

Distribution: Tropical premontane wet forest sites in the Cordillera Occidental of Colombia, 1350–1680 m ( Fig. 16 ).

Figures

Figure 16. Geographical distribution of four species of Geophis in Panama and western Colombia. G. betanensis and G. nigroalbus are sympatric in Colombia.