We describe a new species of lizard of the genus Plestiodon from the Sierra Madre del Sur of Guerrero, Mexico. Plestiodonnietoi sp. nov. shares a characteristic with all members of the P. brevirostris group in that the scale that medially bordersthe postgenial is wider than long. This species is most similar to P. brevirostris and P. indubitus from which it differs byhaving the following combination of characters: large adult size, interparietal enclosed posteriorly by parietals, and a pale lateral line on the neck.
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Feria‐Ortiz et al. (2012) studied this question.
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