70 



averaged 92 mm SVL (range 82-101), Clutch size was 3.9+.53 (1-6). Egg 

 weight was 11-12% of body weight. Immatures ranged from 56-79 mm SVL. 

 Adult females were collected from 10 May to 10 August. Oviducal eggs 

 were found from 2t* May until 12 July. _C. tigris seasonal and sexual 

 activity is shorter in Utah than in Arizona and New Mexico. The length 

 of male sexual activity in Arizona >New Mexico-Texas > Utah. The ave- 

 rage size of mature males in Utah > New Mexico-Texas > Arizona. Fe- 

 males possess oviducal eggs for 1 month in Utah, 2 months in New Mexico 

 and Texas, and 3 months in Arizona. The frequency of gravid females 

 collected peaked in June-July in Utah, declined steadily between May 

 and July in New Mexico and Texas, and peaked in April and June in Ari- 

 zona. Utah females averaged twice as many eggs per clutch than the 

 others; the pattern of female size at maturity followed that of males. 

 Hatchlings were first seen 'f September in Utah, 1 August in New Mexico, 

 and 14 June and 7 July in two different years in Arizona. Fat body cy- 

 cles are described. 



183. Pennock, L. A. 1965. Triploidy in parthenogenetic species of 

 the Teiid lizard genus Cnemidophorus . SCIENCE l't9(3683): 539-5^^0. 



The somatic cells of Cnemidophorus neomexicanus , _C. tigris sep - 

 tentrionalis , _C. velox , _C. tesselatus and _C. exsanguis possessed 46, 

 46, 68, 69, and 70 chromosomes, respectively; therefore, the latter 

 three are triploid. The generalized karyotype is described. The tri- 

 ploids appear to consist of 3 separate sets of chromosomes rather than 

 a complement resulting from fragmentation of the basic set found in 

 bisexual species. 



18*. — . 1966. A karyotype study of parthenogenetic species in the 

 Teiid lizard genus Cnemidophorus from southwestern United States. 

 PH.D. DISSERTATION, UNIVERSITY OF COLORADO. 96 p. 



Several species ( gularis , inornatus and 3 subspecies of tigris 

 (probably gracilis , marmoratus and septentrionalis )) possess a 2N chro- 

 mosome number of 46. The first two species' karyotypes are nearly 

 identical in appearance and have a fundamental number of 48. The lat- 

 ter species' fundamental number is 52. _C^. perplexus (= neomexicanus ), 

 _C. velox, _C. tesselatus, _C. uniparens and _C. exsanguis possess chromo- 

 some complements of 46, 68, 69, 69, and 69-70, respectively; the first 

 species is diploid and the remainder triploid. _C. inornatus and _C. 

 tigris are implicated as the parental species of _C. perplexus . The re- 

 mainder of the parthenogenetic species can be derived, although not un- 

 equivocally, karyotypically from various combinations of inornatus and 

 tigris . Karyotypic variation is found in different populations of ex - 

 sanguis . The author is opposed to formal taxonomic revisions within 

 these parthenogenetic species until variation within them is better un- 

 derstood (from abstract). 



