6'^ 



vived only half as long whereas 3 more xerlcally-adapted species survi- 

 ved considerably longer. Interspecific water loss rates have not yet 

 been determined in the Teiidae as yet, but the emerging pattern for 

 reptiles is a close correlation between loss rate and degree of habitat 

 aridity. 



172. Neaves, W. B. 1969. Adenosine deaminase phenotypes among sexual 

 and parthenogenetic lizards in the genus Cnemidophorus (Teiidae). 

 JOURNAL OF EXPERIMENTAL ZOOLOGY 171(2): 175-18^. 



Electrophoresis was performed for several enzymes on various spe- 

 cies of Cnemidophorus . Lizards from Colorado, New Mexico and Texas 

 were used in the analyses. Adenosine deaminase (ADA) is polyallelic 

 and controlled by a single autosomal locus. ADA phenotypes are: C. 

 septemvittatus (ADA-1), _C. gularis (ADA-2), _C. sexlineatus and _C. t[- 

 gris (ADA-3), _C. inornatus (ADA-^). Parthenogenetic species examined 

 have the following ADA phenotypes: diploid _C. tesselatus 1-3, triploid 

 C. tesselatus 1-3-3, _C. neomexicanus 3-4, _C. uniparens and _C. velox , 

 3-4-4, and _C. exsanguis 2-3-4. Parthenogenetic phenotypes were compar- 

 ed with mixtures of suspected sexual parental phenotypes and were found 

 to be virtually indistinguishable. Thus, diploid _C. tesselatus are the 

 result of (a) hybridization event(s) between _C. tigris and _C. septemvi- 

 ttatus . Evidence from karyotypes and lactate dehydrogenase (LDH) geno- 

 types indicate that _C. tigris and not jC. sexlineatus was involved in 

 the above event(s). The evidence likewise indicates that triploid _C. 

 tesselatus arose from cross(es) between diploid tesselatus and _C. sex - 

 lineatus . _C. sexlineatus is also homozygous for an allele of 6-phos- 

 phogluconic acid dehydrogenase (PGD) not found in the other sexual spe- 

 cies; triploid tesselatus possess this allele in a single dose with a 

 double dose of the other allele. The evidence also indicates that _C. 

 tigris X _C. inornatus event(s) led to _C. neomexicanus . The origins of 

 the remaining 3 parthenospecies in unclear, and does not appear on the 

 basis of available evidence to involve any possible combination of the 

 5 sexual species studied here. For each enzyme surveyed among the par- 

 thenospecies, only a single characteristic heterozygous genotype was 

 observed in all individuals of each species. This, plus evidence from 

 histocompatability work, suggests that all diploid tesselatus may be 

 genetically identical and hence derived from one unique interspecific 

 hvbridization. 



173. — . 1971. Tetraploidy in a hybrid lizard of the genus Cnemido - 

 phorus (Teiidae). BREVIORA 381: 1-25. 



A hybrid _C. exsanguis X _C. inornatus collected from a weed bed 

 between railroad tracks and the city zoo in Alamogordo, New Mexico, 

 possesses a tetraploid chromosome complement. The hybrid habitat sup- 

 ports dense populations {50 and 10 lizards per acre, respectively) of 

 the two parental species. A detailed description of the aberrant li- 



