The land snail superfamily Orthalicoidea is a large family distributed on most southern continents, but predominantly present in the Neotropics. Its current taxonomic status is under dispute, some authors downgrading or giving familiar rank to some of the groups previously treated as subfamilies. The phylogenetic relationships are not well understood, due to scant molecular studies in which species of this group are treated. Moreover, recently a relationship of the Coelociontidae and Megaspiridae to this group has been suggested.
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