A New Subspecies of Lizard, Cnemidophorus sacki, from Michoacán, México

A herpetological study documents and names a distinct subspecies of Cnemidophorus from the Tepalcatepec Valley in Michoacán, Mexico, designating a holotype and paratypes and providing detailed morphological diagnosis. The author reports large adult size, counts of dorsal granules and femoral pores, characteristic scutellation, and a male color pattern with fused paravertebral spots and a pink throat bearing a blue median marking. Measurements, variation among sexes and ages, and ontogenetic changes from striped juveniles to spotted, suffused adult patterns are described. The paper compares the population with neighboring subspecies to justify its taxonomic status and includes figures illustrating head scutellation and juvenile pattern.