At Conchas Lake State Park, San Miguel County, New Mexico, four allozymic variants of parthenogenetic Cnemidophorus tesselatus pattern class C and three allozymic variants of C. tesselatus D are syntopic with one gonochoristic and two parthenogenetic congeners. Our study of 14 individuals revealed that C. tesselatus C and D from this site are histoincompatible with both their maternal, Cnemidophorus tigris marmoratus, and paternal, Cnemidophorus gularis septemvittatus, progenitors. Evidence of skin histocompatibility between these combinations of C. tesselatus pattern class C and D lizards supports the hypothesis of a single hybrid origin for representatives of this species at the study site.
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Cordes et al. (2003) studied this question.
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