Retrieving "Potamoidea" from the archives

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1. Freshwater Crab

   Linked via "Potamoidea"

   Taxonomy and Phylogeny
   Freshwater crabs are polyphyletic, meaning the classification does not trace back to a single common ancestor exclusively inhabiting freshwater environments. The primary groups commonly referred to as freshwater crabs belong to the superfamily Potamoidea and the superfamily Gecarcinucoidea, both within the section Cancridea. Recent molecular phylogenetic studies suggest that several families within these superfamilies have independently adapted to freshwater life from marine or estuarine ancestors over geological timescales[^3].
   The most sp…