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Variation in and distribution of the unisexual lizard, Cnemidophorus tesselatus. American Museum novitates ; no. 2235

Show simple item record Zweifel, Richard George, 1926- en_US 2005-10-06T17:32:58Z 2005-10-06T17:32:58Z 1965 en_US
dc.description 49 p. : ill., maps ; 24 cm. en_US
dc.description Includes bibliographical references (p. 46-49). en_US
dc.description.abstract "Cnemidophorus tesselatus is a species of lizard in which males are virtually absent. Hence, reproduction presumably is parthenogenetic. Variation of the species as a whole is similar to that of bisexual forms, but samples of local populations of tesselatus show greatly restricted variation in color pattern and scutellation in comparison to similar samples of the bisexual form C. tigris. Presumably this restriction results from the great reduction in recombination that is a consequence of unisexual reproduction. Five allopatric classes of color pattern are recognized in tesselatus. Populations of a sixth class occur in two widely separated areas, in each of which they are sympatric with another class. Differences in scutellation correlate with differences in color pattern of sympatric populations, indicating that two genetically distinct clonal lines coexist. The most widespread color-pattern class is relatively uniform in scutellation over a wide geographic area, whereas populations with more restricted geographic distributions tend to differ, in some cases markedly, from locality to locality. Differences in scutellation and color pattern among populations of tesselatus are similar to those that distinguish subspecies in bisexual species of Cnemidophorus. However, complications introduced by sympatric clones and discordant variation render the recognition of subspecies impractical in the unisexual species. Retention of all the populations within one species is recommended as best exemplifying their relationships, even though gene exchange between parthenogenetic populations manifestly is impossible"--P. 41. en_US
dc.format.extent 4783352 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York, N.Y. : American Museum of Natural History en_US
dc.relation.ispartofseries American Museum novitates ; no. 2235 en_US
dc.subject.lcc QL1 .A436 no.2235, 1965 en_US
dc.subject.lcsh Cnemidophorus tesselatus. en_US
dc.subject.lcsh Lizards -- Southwestern States. en_US
dc.subject.lcsh Lizards -- Mexico. en_US
dc.subject.lcsh Parthenogenesis in animals. en_US
dc.subject.lcsh Reptiles -- Southwestern States. en_US
dc.subject.lcsh Reptiles -- Mexico. en_US
dc.title Variation in and distribution of the unisexual lizard, Cnemidophorus tesselatus. American Museum novitates ; no. 2235 en_US
dc.title.alternative Unisexual lizard en_US
dc.type text en_US

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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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