Fig. 7From: Geographical patterns in species richness of the benthic polychaetes in the continental shelf of the Gulf of California, Mexican PacificObserved species richness (dots) and simulated latitudinal distribution, the top curve represents all 244 species of polychaetes analysed (the dotted lines represent the limits of 95 % confidence level). Downwards, the computed curves (dashed lines) display results from 123 wide-ranging species (≥6° latitude), from 52 species with intermediate ranges (3,6) and from 69 species with ranges narrow that 3° latitude, respectivelyBack to article page