Caecopilumnus, Genus – synonym of Typhlocarcinodes, Genus
Calappidea, Familia – synonym of Calappidae, Familia
Calappinae, Familia – synonym of Calappidae, Familia
Calappoidea, Superfamilia – synonym of Leucosioidea, Superfamilia
Calmaniini, Familia – synonym of Pilumnidae, Familia
Camara, Genus – synonym of Calappa, Genus
Campanularioidea, Superfamilia
Camposcinae, Familia – synonym of Majidae, Familia
Camptandriinae, Familia – synonym of Camptandriidae, Familia
Camptandriinae Serène & Kumar, 1971, Familia – synonym of Ocypodidae, Familia
Camptandrini, Familia – synonym of Ocypodidae, Familia
Canceridae, Familia – synonym of Cancridae, Familia
Cancerides, Familia – synonym of Cancridae, Familia
Cancrinae, Familia – synonym of Cancridae, Familia
Caphyrinae Miers, 1886, Familia – synonym of Portunidae, Familia
Carcinidae, Familia – synonym of Portunidae, Familia
Carcinonectes, Genus – synonym of Benthochascon, Genus
Carcinoplacidae, Familia – synonym of Goneplacidae, Familia
Carcinoplacinae, Familia – synonym of Goneplacidae, Familia
Cardiosoma, Genus – synonym of Cardisoma, Genus
Cardisomaceen, Familia – synonym of Gecarcinidae, Familia
Carpilinae, Familia – synonym of Carpiliidae, Familia
Carpilodes, Genus – synonym of Liomera, Genus
Carpiloxanthus, Genus – synonym of Liomera, Genus
Carpoporoides, Genus – synonym of Hepatoporus, Genus
Carupidae, Familia – synonym of Portunidae, Familia
Catoptrinae, Subfamilia – synonym of Carupinae, Subfamilia
Celuca, Genus – synonym of Uca, Genus
Ceratocarcininae, Familia – synonym of Pilumnidae, Familia
Ceratophthalma, Genus – synonym of Ocypode, Genus
Charybdis, Subgenus (Charybdis)
Cheiragonus, Genus – synonym of Telmessus, Genus
Chiromanthes, Genus – synonym of Chiromantes, Genus
Chlorinoides, Genus – synonym of Naxioides, Genus
Chlorodinae, Subfamilia – synonym of Chlorodiinae, Subfamilia
Chlorodinae Dana, 1851b, Familia – synonym of Xanthidae, Familia
Chlorodioida, Subfamilia – synonym of Chlorodiinae, Subfamilia
Chlorodopsis, Genus – synonym of Pilodius, Genus
Chorininae, Familia – synonym of Majidae, Familia
Cleistotomatini, Familia – synonym of Camptandriidae, Familia
Clistostoma, Genus – synonym of Cleistostoma, Genus
Coelochirus, Genus – synonym of Ptychognathus, Genus
Collodinae, Subfamilia – synonym of Inachoidinae, Subfamilia
Conchoedromia, Genus – synonym of Conchoecetes, Genus
Criocarcininae, Familia – synonym of Majidae, Familia
Cryptochirinae, Familia – synonym of Cryptochiridae, Familia
Cryptocnemidae, Subfamilia – synonym of Cryptocneminae, Subfamilia
Cryptopodiinae, Familia – synonym of Parthenopidae, Familia
Curtonotus, Genus – synonym of Carcinoplax, Genus
Cyclacinae, Familia – synonym of Majidae, Familia
Cyclës, Genus – synonym of Cycloes, Genus
Cycloachelous, Genus – synonym of Portunus, Genus
Cycloblepas, Genus – synonym of Actaeodes, Genus
Cyclodorippae, Familia – synonym of Cyclodorippidae, Familia
Cyclodorippoidea, Superfamilia
Cycloes, Genus – synonym of Cycloes, Genus
Cycloës, Genus – synonym of Cycloes, Genus
Cyclograpsacea, Familia – synonym of Grapsidae, Familia
Cyclois, Genus – synonym of Cycloes, Genus
Cyclomaia, Genus – synonym of Cyclax, Genus
Cycloxanthus, Genus – synonym of Cycloxanthops, Genus
Cymoida, Subfamilia – synonym of Cymoinae, Subfamilia
Cymoidae, Subfamilia – synonym of Cymoinae, Subfamilia
Cymonomae, Familia – synonym of Cymonomidae, Familia
Cymonomops, Genus – synonym of Tymolus, Genus
Cymopolia, Genus – synonym of Parapalicus, Genus
Cymopolidae, Familia – synonym of Palicidae, Familia
Cymopoliidae, Familia – synonym of Palicidae, Familia
Cyphocarcininae, Familia – synonym of Majidae, Familia
Cyrtomaja, Genus – synonym of Cyrtomaia, Genus