^8 



Seasonal activity and gonadal cycles are described for Cnemido - 

 phorus inornatus arizonae from Cochise County, Arizona. 



126. — . cind 3. W. Wright. 1964. Species of the Cnemidophorus exsan - 

 guis subgroup of whiptail lizards. 3. ARIZ. ACAD. SCI. 3: 78-80. 



Cnennidophorus flagellicaudus and _C. sonorae are formally named, 

 described and differentiated from _C. exsanguis . Ecological and geo- 

 graphic distributions are given for all three species, and variation 

 where two or more of them occur sympatrically is discussed. 



127. — . cind — . 1966. Evolution of parthenogenetic species of Cnem - 

 idophorus , whiptail lizards, in western North America. JOURNAL OF 

 THE ARIZONA ACADEMY OF SCIENCES M2): 81-87. 



A karyotypic classification is given for the genus. The partheno- 

 species Cnemidophorus neomexicanus is thought to have originated from 

 hybridization between the sexual species C. inornatus and C_. tigris , 

 based on karyotypic evidence. The triploid parthenospecies _C. uniparens 

 possesses two inornatus- like chromosome complements and one attributed 

 to the sexual species _C. gularis . A hypothesis is presented for the 

 evolution of triploid parthenogenetic species. It is suggested that C. 

 neomexicanus is a very recent species, partly because C. tigris today 

 occupies successfully and abundantly the most recently evolved major 

 habitat (desert) in the West, and has recently produced within this en- 

 vironment an array of ecotypes and subspecies in all its major subdivi- 

 sions. The type specimen of Cnemidophorus perplexus is thought to be a 

 triploid individual from a cross between _C. neomexicanus and jC. inorna - 

 tus , and specimens referrable to the former indicative of an unsuccess- 

 ful parthenogenetic event in this genus (see Wright ic Lowe, 1967b). 



128. — , — , C. a. Cole and R. L. Bezy. 1970a. Natural hybridization 

 between the Teiid lizards Cnemidophorus sonorae (parthenogenetic) and 

 Cnemidophorus tigris (bisexual). SYSTEMATIC ZOOLOGY 19(2): 114-127. 



Two hybrid individuals from the Santa Rita Experimental Range in 

 Pima County, Arizona, and their parental species are morphologically and 

 karyotypically described. The hybrids possess 3 genomes from _C. sonorae 

 and one from _C^. tigris . The hybrid habitat is desert-grassland (mes- 

 quite type), elevation 3750 ft. _C. tigris is by far the most abundant 

 species; _C. sonorae and_C. uniparens occur in much fewer numbers and are 

 largely restricted to riparian and open (non-mesquite) grassland habi- 

 tats. The appearance of desert-grassland habitats during the present 

 century due to environmental changes and the contribution of these chan- 

 ges to hybridization in this genus are discussed. The ecologic trans- 



