Title
Karyotypes and evolution of the spinosus group of lizards in the genus Sceloporus
Title Variants
Alternative:
Lizard karyotypes
Related Titles
Series:
American Museum novitates, no. 2431
By
Cole, Charles J.
Type
Book
Material
Published material
Publication info
New York, N.Y American Museum of Natural History [1970]
Notes
Title from caption.
"September 28, 1970."
"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.
Subjects
Cytogenetics
,
Evolution
,
Genetics
,
Karyotypes
,
Lizards
,
Mexico
,
Reptiles
,
Sceloporus
,
Southwestern States
Call Number
QL1 .A436 no.2431, 1970
Language
English
Identifiers
OCLC:
45537967
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