Mouthparts of C. nr. anthracinus

a. Pecten epipharyngis with somewhat variable teeth; b. Antenna with relatively long basal segment; c. Mentum with broad centre tooth (type I - II),
4th laterals reduced about to level of 5th laterals (type II); d. Ventromentum; e. Mandible type II, with the 3rd inner tooth here somewhat reduced

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