Xenosaurus rectocollaris
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Xenosaurus rectocollaris, sometimes known as the pallid knob-scaled lizard, is a species of viviparous lizard. It is endemic to Mexico where it is known from the Sierra Madre de Oaxaca of Oaxaca and Puebla states.<ref name=IUCN/><ref name=RDB/> It is a rare species occurring in rock crevices in pristine semi-arid areas.<ref name=IUCN/>