If one plots the frequencies of cell occurrences for the 93 species, i.e., their distribution frequencies, one sees a typical “J-curve,” with the majority of species having highly restricted ranges.  Nearly ½ of the species are known from 5 or fewer cells and therefore could be considered “rare.”  Indeed, 19 species are known from only a single cell (= “subpopulation”).   The 16 cells in which these 19 species are only found are “irreplaceable” in terms of the minimum areas (cells) necessary to conserve all 93 species.

Distribution Profile