Morphological characters used in the identification keys A tip of rostrum distinctly overreaching end of scaphocerite B tip of rostrum not reaching end of scaphocerite C tip of rostrum reaching end of scaphocerite D epipods present on third maxilliped and first and second pereiopods E epipod present on third maxilliped but absent from all pereiopods F rostrum long but not very slender G chelae of first and second pereiopods stout, setae on tip of fingers approx. half as long as chelae H chelae of first and second pereiopods very slender, setae on tip of fingers approx. as long as chelae I epipod vestigial present on third maxilliped and absent from all pereiopods J rostrum of C. ensifera Schenkel, 1902 K rostrum of C. caerulea von Rintelen & Cai, 2009 L rostrum reaching end of second segment of antennular peduncle and slender.