Mouthparts of C. anthracinus.                                                                  Gula and frontoclypeus of C. anthracinus

a. Pecten epipharyngis with relatively broad even teeth; b. Antenna with relatively long basal segment; c. Mentum with broad centre tooth
(type IB-IIA), 4th laterals reduced about to level of 5th laterals (type II); d. Ventromentum with 37-45 striae;
e. Mandible type II-IIIB, with the 3rd inner tooth here somewhat reduced.

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