Acanthodes, Genus – synonym of Hypothalassia, Genus
Acanthonychidae, Subfamilia – synonym of Epialtinae, Subfamilia
Acanthonychinae, Subfamilia – synonym of Epialtinae, Subfamilia
Acanthophrys, Genus – synonym of Naxioides, Genus
Acanthoplax, Genus – synonym of Uca, Genus
Acanthopus, Genus – synonym of Percnon, Genus
Achaeinae, Familia – synonym of Majidae, Familia
Achelous, Genus – synonym of Portunus, Genus
Actaeidae, Subfamilia – synonym of Actaeinae, Subfamilia
Actaemorpha, Genus – synonym of Drachiella, Genus
Actaeopsis, Genus – synonym of Liomera, Genus
Actumninae, Familia – synonym of Pilumnidae, Familia
Aeneacancer, Genus – synonym of Ovalipes, Genus
Aethrinae, Familia – synonym of Aethridae, Familia
Afruca, Genus – synonym of Uca, Genus
Amathia, Genus – synonym of Rochinia, Genus
Amathinae, Familia – synonym of Majidae, Familia
Amorphopus, Genus – synonym of Paeduma, Genus
Amphitrite, Genus – synonym of Portunus, Genus
Amphiuca, Genus – synonym of Uca, Genus
Anamathia, Genus – synonym of Rochinia, Genus
Anomalopinae, Familia – synonym of Majidae, Familia
Apiomaia, Genus – synonym of Pyromaia, Genus
Arachnodromia, Genus – synonym of Dicranodromia, Genus
Archaeoplax, Genus – synonym of Retropluma, Genus
Arenaeinae, Familia – synonym of Portunidae, Familia
Asterolambrus, Genus – synonym of Dairoides, Genus
Atelecyclinae, Familia – synonym of Atelecyclidae, Familia
Atelecylidae, Familia – synonym of Atelecyclidae, Familia
Aulacolambrus, Subgenus (Parthenope)
Australuca, Genus – synonym of Uca, Genus
Austruca, Genus – synonym of Uca, Genus