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Phalotris Cope, 1862 is a fossorial dipsadid snake genus that encompasses 15 species, distributed mainly in open areas from Northeastern Brazil to Southern Argentina. Some of its species are known from small series, and there is little to no knowledge on their morphological variation and species delimitations. In this work, we analyze the taxonomic status of Phalotris cerradensis Silveira, 2020, a recently described species known from a single specimen, and provide evidence for its synonymy with Phalotris concolor

The Troschel's Pampas Snake, Phimophis guianensis (Troschel, 1848), is widely distributed in Amazonian Savannas at northern South America and a small portion of southern Central America, being recorded to Brazil based on three historical records, that ranged from 1997 to 2002, in Amapá and Pará states. In this study, we revise all known records of P. guianensis, providing an updated distribution map, and the first record to Roraima state.

Weverton dos Santos Azevedo Uma abordagem preliminar à taxonomia de Tantilla melanocephala (Linnaeus, 1758) (Serpentes: Colubrinae), com base em dados morfológicos e moleculares A preliminary approach to the taxonomy of Tantilla melanocephala (Linnaeus, 1758) (Serpentes: Colubrinae), based on morphological and molecular data São Paulo 2022 Weverton dos Santos Azevedo Uma abordagem preliminar à taxonomia de Tantilla melanocephala (Linnaeus, 1758) (Serpentes: Colubrinae), com base em dados morfológicos e moleculares A preliminary approach to the taxonomy of Tantilla melanocephala (Linnaeus, 1758) (Serpentes: Colubrinae), based on morphological and molecular data