A new species of Tantilla (Squamata: Colubridae) of the calamarina group from volcán Ceboruco, Nayarit, Mexico

Abstract

(2) the Balsas Basin of Morelos, Puebla, Distrito Federal, and the State of Mexico

A new species of Tantilla is described from a single specimen obtained from Volcan Ceboruco, southern Nayarit, Mexico. The new species closely resembles other species of the Tantilla calamarina group. With the addition of the taxon described herein, the calamarina group now contains seven species, T. calamarina, Tantilla cascadae, Tantilla coronadoi, Tantilla deppei, Tantilla sertula, Tantilla vermiformis, and the new species described herein. Collectively, members of the group are distributed along the Pacific versant of Middle America in three disjunct regions: (1) from northern Sinaloa to Guerrero, including the Tres Marias Islands

and (3) from El Salvador to northwestern Costa Rica. We provide a small list of specimens collected in the highlands of Nayarit, and report Lithobates psilonota, Ambystoma rosaceum, Elgaria kingi, Plestiodon lynxe and Rhadinaea hesperia for the first time from the state. We report the second specimen of T. sertula, known previously only from the holotype.