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4 Introduction to the keys of Tribus, Larvae of Tanypodinae

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Chapter Summary

Tanypodinae larvae are easily distinguished from other subfamilies. All larvae are free-living. In Tanypodinae, the antenna is never on a pedestal, but is retractile and can be drawn into a tube inside the head. The larva can be rolled by moving the coverslip to the left or right with one fingertip, and the larva will not be flattened. Setae can be seen best with diascopic illumination. There exists no general rule to distinguish different instars of Tanypodinae larvae. The pupal and adult characters gradually appear during the fourth instar. The occipital margin (a rim at the back of the head) runs around the head and differs in many species on the ventral and dorsal sides. The tentorial line can be seen easily. Dark pigments are absent the first day after moulting and become gradually less strong after storing for one or more years.

Keywords: dark pigments; instar; occipital margin; setae; Tanypodinae larvae; tentorial line



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