Teiidae is a family of lizards native to the Americas. Members of this family are generally known as whiptails, though the tegus also belong to this family. The group includes the parthenogenic genera Cnemidophorus and Aspidoscelis, and the non-parthenogenic Tupinambis. It has over 230 member species in ten genera. About 75% of the species are in two dominant genera, Aspidoscelis and Cnemidophorus.