We report new distributional records for 16 species of amphibians and reptiles from the northern Mixteca region of Oaxaca, Mexico. Notable observations include the first state record of Leptodeira splendida (Squamata, Colubridae), a new locality for the endemic Tantalophis discolor (Squamata, Colubridae), the first record of Barisia planifrons (Squamata, Anguidae) in Mixteca. We omment on an issue with the identification of the tadpoles used to describe a new taxon, Sarcohyla ameibothalame (Anura, Hylidae) from the Mixteca (Canseco-M rquez et al. 2002). Additionally, we updated the regional checklist of 31 species (5 amphibians and 26 reptiles), of which more than 80% are Mexican endemics and 13% are state endemics.
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