Several lizards are centered in the Chihuahuan Desert, and include the Texas horned lizard (Phrynosoma cornutum), Texas banded gecko (Coleonyx brevis), reticulated gecko (C. reticulatus), greater earless lizard (Cophosaurus texanus), several species of spiny lizards (Scelpoprus spp.), and marbled whiptails (Cnemidophorus tigris marmoratus).    From Wordnik.com.  [Chihuahuan desert] Reference

However, the following avifauna and herpetofauna are characteristic of the Mojave region in particular: LeConte’s thrasher (Toxostoma lecontei), banded gecko (Coleonyx variegatus), desert iguana (Dipsosaurus dorsalis), chuckwalla (Sauromalus obesus), and regal horned lizard (Phrynosoma solare).    From Wordnik.com.  [Mojave desert] Reference

A large number of specialist and endemic species of plants and animals are found here, including the Quino checkerspot butterfly (Euphydryas editha quino), Hermes copper butterfly (Lycaena hermes), San Diego thorn mint (Acanthomintha ilicifolia), San Diego ambrosia (Ambrosia pumila), San Diego barrel cactus (Ferocactus viridescens), San Diego pocket mouse (Perognathus fallax), Merriam kangaroo rat (Dipodomys merriami), Stephens kangaroo rat (Dipodomys stephensi), red-diamond rattlesnake (Crotalus ruber), San Diego banded gecko (Coleonyx variegatus abbotti), San Diego horned lizard (Phrynosoma coronatum blainvillei), California gnatcatcher (Polioptila californica), and the coastal populations of the cactus wren (Campylorhyncus brunneicapillus).    From Wordnik.com.  [California coastal sage and chaparral] Reference