Mouthparts of C. vitellinus
a. Pecten epipharyngis.  Note the somewhat irregular teeth.  b. Antenna, with relatively long, narrow basal segment.
c. Mentum.  Note the well separated c2 teeth which slope towards c1 of the central trifid tooth (type IIa).
4th laterals hardly reduced (type I). d. Ventromentum, about 4 times wider than deep.
e. Mandible  Note the coloured and separate third inner tooth (type IIIC).


Premandible of C. vitellinus

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