Mouthparts of C. species 2n.
a. Premandible showing narrow outer tooth; b. Antenna with basal segment just over twice the length of the other segments combined (AR abt. 1.9 - 2.3);
c. Pecten epipharyngis with somewhat variable teeth; d. Mentum with c2 teeth only partially developed (type I), 4th laterals reduced almost to level of 5th laterals
(type I-II), 6th laterals arising at a lower level; e. Ventromentum with about 40 striae; f. Mandible type II, with the 3rd inner tooth relatively well developed.

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