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Article
Published: 2020-12-16

A new species of cat-eyed snake (Serpentes: Dipsadinae: Leptodeirini) from the Andes of southern Ecuador

Museo de Zoología, Departamento de Ciencias Biológicas, Pontificia Universidad Católica del Ecuador, Avenida 12 de Octubre 1076 y Roca, Apartado 17-01-2184, Quito, Ecuador.
Instituto de Ciencias Naturales, Universidad Nacional de Colombia, A.A. 7495, Bogotá, Colombia. Instituto Nacional de Biodiversidad, calle Rumipamba 341 y Av. de los Shyris, Casilla 17-07-8976, Quito, Ecuador.
Instituto Nacional de Biodiversidad, calle Rumipamba 341 y Av. de los Shyris, Casilla 17-07-8976, Quito, Ecuador. Laboratorio de Herpetología, Museo de Zoología, Escuela de Biología, Ecología y Gestión, Universidad del Azuay, Avenida 24 de mayo 7-77 y Hernán Malo, Apartado 01-01-981, Cuenca, Ecuador.
Laboratorio de Herpetología, Museo de Zoología, Escuela de Biología, Ecología y Gestión, Universidad del Azuay, Avenida 24 de mayo 7-77 y Hernán Malo, Apartado 01-01-981, Cuenca, Ecuador.
Department of Herpetology, Zoologisches Forschungsmuseum Alexander Koenig (ZFMK), Adenauerallee 160, 53113 Bonn, Germany.
Serpentes Andes color pattern hemipenial morphology Leptodeira ornata Leptodeira larcorum Leptodeira septentrionalis molecular phylogeny

Abstract

Leptodeira is one of the most widespread and taxonomically problematic snake taxa in the Americas. Here we describe a new species of Leptodeira from the Andes of southern Ecuador based on morphological and molecular data. The new species is geographically close and morphologically similar to L. ornata and L. larcorum, from which it can be distinguished by having smaller dorsal body blotches, a longer tail, and shorter spines on the hemipenial body. The shortest genetic distances between the new species and its congeners are 0.02 (16S), 0.05 (cytb), and 0.18 (ND4). The new species is restricted to the Jubones River Basin in southern Ecuador, an area of endemism for other reptile species. Our phylogenetic analysis based on mitochondrial and nuclear DNA sequence data also supports recognition of the names L. larcorum (restricted to Peru) for “L. septentrionalis larcorum”, and L. ornata for populations of “L. s. ornata” from central and eastern Panama, western Colombia, and western Ecuador. However, some samples of “L. s. ornata” from Panama and Costa Rica, as well as the new species described herein, are not included within or more closely related to L. ornata, which is sister to the clade (L. bakeri, L. ashmeadii).

 

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