Abstract
univariate and multivariate statistiscal analyses of 39 meristic characters recorded for 12 sample of the lizard Liolaemus monticola were used to compare geographical variation in morphology with chromosomal races north and south of the Maipo River in central Chile. This extends a previous morphological study in the Andes Range and confirms that the Maipo River is a biogeographical barrier that also separates chromosomal races in the Coast Rnage. The phenetic variation among samples in sufficient to diffenetiate the chromosomal races, and also distinguishes population of the Coast Range from those of the Andes within chromosomal races. A possible historical sequence of events that accounts for the pattern of morphological differentiation is advanced.
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