Table 2 in A review of primary freshwater crab mandible morphology: terminology and systematic importance (Crustacea: Decapoda: Brachyura)

Table 2. Revised descriptions of the characters of the mandible of the seven freshwater crab families.
Freshwater crab familyMandible first articleMandible second articleMandible third and fourth articlesMandible terminal article (A2)DeckeniidaeCoxaBasisEndopods 1 and 2Bilobed/ridged/ simpleEpiloboceridaeCoxaBasisEndopods 1 and 2BilobedGecarcinucidaeCoxaBasisEndopods 1 and 2BilobedPotamidaeCoxaBasisEndopods 1 and 2Simple/bilobedaPotamonautidaeCoxaBasisEndopods 1 and 2Simple/ridgedPseudothelphusidaeCoxaBasisEndopods 1 and 2BilobedTrichodactylidaeCoxaBasisEndopods 1 and 2Simple
aOnly one species (Gempala bilobata) out of>615 species of Potamidae has a bilobed palp.