A new ‘horned’ Stenocercus from the highlands of southeastern Brazil, and redescription of Stenocercus tricristatus (Reptilia: Tropiduridae)

Author(s)

Teresa C. S. Ávila-Pires ^[1] ; Cristiano de C. Nogueira ^[2] ; Marcio Martins ^[3]

Affiliation

^[1] Museu Paraense Emílio Goeldi. Coordenação de Zoologia - Brasil

^[2] Universidade de São Paulo. Instituto de Biociências. Departamento de Ecologia - Brasil

^[3] Universidade de São Paulo. Instituto de Biociências. Departamento de Ecologia - Brasil

• Document type: Journal article
• Source: Zoologia; v. 36, 2019-06-06.

Abstract

ABSTRACT A new species of the lizard genus Stenocercus Duméril & Bibron, 1837 is described based on six specimens from Serra da Canastra, Minas Gerais, southeastern Brazil. Similar to S. tricristatus (Duméril, 1851), S. dumerilii (Steindachner, 1867), S. quinarius Nogueira & Rodrigues, 2006, and S. squarrosus Nogueira & Rodrigues, 2006, the new species has a pyramidal head and an enlarged, dorsally projected post-supraciliary scale, like a small horn. It is most similar to S. tricristatus, from which it differs in having a more elongated head in ventral view; a larger number of scales around midbody; a distinctly enlarged, smooth preauricular scale; and probably a larger body size. Moreover, the new species has distinctly keeled scales, with phylloid and mucronate dorsals; no enlarged supraoculars; no neck folds; a vertebral, and a pair of dorsolateral and (weak) lateral crests. A redescription of S. tricristatus is presented for comparison with the new species. (AU)

• FAPESP's process: 11/50206-9 - Origin and evolution of snakes and their diversification in the Neotropics: a multidisciplinary approach
• Grantee: Hussam El Dine Zaher
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants
• FAPESP's process: 15/20215-7 - Biogeography, biodiversity and conservation of cis-Andean squamate reptiles
• Grantee: Cristiano de Campos Nogueira
• Support Opportunities: Research Grants - Young Investigators Grants