Kieffer, 1909
Subgenus Trichotendipes
Body
Medium sized larvae up to 8 mm. No lateral tubules (Wiederholm, 1983; Moller Pillot, 1984a).
Head
The head capsule shining. Anterior margin of fronto-clypeal apotome straight or convex with a subapical pit. Only labral sclerite 2 is present with a separate clypeus Trichotendipes frontocl.
Antenna
The antenna consists of 5 segments. The blade is shorter than the flagellum. Lauterborn organs distally on the second segment.
Mentum
The mentum has one large median tooth and 6 pairs of regularly declining lateral teeth Glyp signatus mentum.
Labrum
SI is palmate and labral lamellae consists of a toothed plate. The pecten epipharyngis with 8-9 subequal strong teeth and no points on the surface. The premandible has two apical teeth (Wiederholm, 1983).
Mandible
The mandible without a dorsal tooth, one apical tooth and 3 inner teeth Glyp signatus mandible. The pecten mandibularis is present and seta interna with 4 toothed and plumose branches.
Differential characteristics
The combination of dull headcapsule, simpel mid-mental tooth and 6 pairs of lateral teeth Glyp mentum are distinctive for sg. Glyptotendipes. Subgenus Caulochironomus can be identified by shining headcapsule, frontoclypeal apotome with concave anterior margin, labral sclerites 1 and 2 present Caulochir frontoclypeus and three inner mandibular teeth. In subgenus Trichotendipes the combination of a subapical pit on the frontal apotome and clypeus separate from frontal apotome Glyp signatus frontoclypeus is distinctive.
G. signatus is easely separated from the other Glyptotendipes by the subapical pit on the frontal apotome and clypeus separate from frontal apotome.