1	Both anterior and posterior knobs representing leg 5 produced posteriorly; leg 6 (genital operculum) with 1 (or rarely 2) small setae terminally	2
–	Only posterior knob representing leg 5 distally produced; leg 6 with 2 (or rarely 3) setae terminally	7
2	Tines of sternal furca widely separated	3
–	Tines of sternal furca close together	C. priacanthi
3	Posterior dentiform process of maxillule covered with minute prominences on medial and apical surfaces	C. nuenonnae
–	Posterior dentiform process of maxillule lacking such prominences	4
4	Maxilliped with rounded process proximally on posterior surface of corpus	C. kajii sp. nov.
–	Maxilliped lacking such process on posterior surface of corpus	5
5	Third segment of antenna with long hook-like process terminally	C. pterois
–	Third segment of antenna with short claw	6
6	Maxillipedal corpus with 1 small dentiform and 1 bipartite process in myxal area	C. musaicus
–	Maxillipedal corpus with 2 spinous processes proximally and 1 rounded process distally along myxal margin	C. pseudorhombi
7	Genital complex almost as long as abdomen	8
–	Genital complex longer than abdomen	12
8	Tines of sternal furca slender with rounded tip	10
–	Tines of sternal furca thick with truncate or spatulate tip	11
10	Maxillipedal corpus with distinct process at mid-level	C. ligatus
–	Maxillipedal corpus without process	C. longirostris
11	Tines of sternal furca with truncate tip	C. similis
–	Tines of sternal furca with spatulate tip	C. hobsoni
12	Caudal ramus about 2 times longer than wide	C. dieuzeidei
–	Caudal ramus almost as long as wide	13
13	Maxillipedal corpus with inner process at mid-length	C. olsoni
–	Maxillipedal corpus with 3 inner processes along myxal margin	14
14	Terminal exopod segment of leg 4 with dentate processes at base of each terminal spine	15
–	Terminal exopod segment of leg 4 with hyaline membrane at base of each terminal spine	C. acanthopagri
15	Four or five tips on dentate processes at base of terminal spines of terminal exopod segment of leg 4	C. latigenitalis
–	Two tips on dentate processes at base of terminal spines of terminal exopod segment of leg 4	C. chinglonglini sp. nov.