| on the geographical differentiation of gymnodactylus geckoides spix, 1825 (sauria, gekkonidae): speciation in the brazilian caatingas. | the specific concept of g. geckoides was initially ascertained based on a topotypical sample from salvador, bahia. geographic differentiation was studied through the analysis of two meristic characters (tubercles in a paramedian row and fourth toe lamellae) and color pattern of 327 specimens from 23 localities. it is shown that the population from the southernmost locality, mucugê, is markedly divergent in all characters studied. a holocene refuge model is proposed to explain the pattern. a deci ... | 2004 | 15558150 |