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Family Callianassidae
Key to genera and species
[Adapted from de Saint Laurent and Le Loeuff, 1979]
Family Callianassidae 293
Dorsal surface of carapace with raised oval area; third maxilliped always lacking
exopod or with exopod vestigial; uropodal exopod with antero-dorsal lobe; fifth
pereopod chelate ., ...........2
Dorsal surface of carapace without raised oval area; third maxilliped with or without
exopod; fifth pereopod subchelate .'.. Gourretia latispina
(1) Propodus of fourth pereopod without disto-ventral prominence; pleopods 1 and 2
always reduced or absent in male; pleopods 3 to 5 with appendix interna projecting
beyond mesial border of endopod; epipod of first maxilliped only slightly dilated
ventrally Callianassa
Propodus of fourth pereopod almost always with disto-ventral prominence;
pleopods 1 and 2 present in male; pleopods 3 to 5 with appendix interna recessed in
endopod and not exceeding, or only slightly exceeding, mesial border; epipod of
third maxilliped with acute anterior lobe; propodus of third maxilliped nearly always
greatly dilated ventrally Callichirus