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Karyotypes and evolution of the spinosus group of lizards in the genus Sceloporus. American Museum novitates ; no. 2431

Show simple item record Cole, Charles J. en_US 2005-10-06T16:32:37Z 2005-10-06T16:32:37Z 1970 en_US
dc.description 47 p. : ill., ; 24 cm. en_US
dc.description Includes bibliographical references (p. 45-47). en_US
dc.description.abstract "Karyotypes of all the species in the spinosus group of lizards of the genus Sceloporus were analyzed by means of the colchicine, hypotonic citrate, air-dried technique, employing both bone marrow and testicular tissues. The following cytogenetic phenomena were found within this species group: interspecific and intraspecific variation in chromosome number and morphology; polymorphism in local populations; cytologically recognizable sex chromosomes; and natural chromosomal aberrations. There are four general karyotypes in the species group, though some exhibit relatively minor variations. Diploid chromosome numbers range from a high of 40 (with nearly all chromosomes telocentric) to a low of 22 (with all or nearly all chromosomes metacentric or submetacentric). The cytogenetic data, together with ecological, behavioral, and biogeographic data, indicate that speciation within the group has produced several phylads. Karyotypic evolution primarily involved chromosomal centric fusion (whole-arm translocation). The proposed phylogeny of the group is strongly compatible with the evidence that desert-dwelling species were derived from ancestors occurring in tropical to subtropical forests"--P. 41-42. en_US
dc.format.extent 11232827 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. 2431 en_US
dc.subject.lcc QL1 .A436 no.2431, 1970 en_US
dc.subject.lcsh Sceloporus -- Cytogenetics. en_US
dc.subject.lcsh Sceloporus -- Genetics. en_US
dc.subject.lcsh Sceloporus -- Evolution. en_US
dc.subject.lcsh Karyotypes. en_US
dc.subject.lcsh Lizards -- Southwestern States. en_US
dc.subject.lcsh Lizards -- Mexico. en_US
dc.subject.lcsh Reptiles -- Southwestern States. en_US
dc.subject.lcsh Reptiles -- Mexico. en_US
dc.title Karyotypes and evolution of the spinosus group of lizards in the genus Sceloporus. American Museum novitates ; no. 2431 en_US
dc.title.alternative Lizard karyotypes 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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