A new species of knob-scaled lizard (Xenosauridae, ) from the Sierra Madre Oriental of Puebla, Mexico.

A new species of in the clade is described from the Sierra Madre Oriental of northern Puebla, Mexico. The new species differs from all of its congeners in possessing a unique combination of characters. The new species appears to be allopatric and fills in the geographic gap between the geographic distributions of and the species in the clade to the north and northwest and those of the species in the and clades to the south and southeast. The new species occurs between approximately 880 m and 1470 m of elevation, and appears to be restricted to cloud forest, which has been replaced by coffee plantations in many areas. An updated key to the species of is provided.