Mouth parts of the larva of Chironomus athalassicus
a. Mentum - note central trifid tooth of type III, and 4th laterals reduced to level of fifth (type II);
b. Antenna;  c. Pecten epipharyngis with broad sharp teeth;  d. Ventromentum -
note broad band at anterior margin;  e. Mandible of type IIB (furrows arrowed).

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