(Zetterstedt, 1838)
Body
Medium sized to large larvae up to 12 mm long. Living larvae red. Claws on the posterior parapods are simpel. No lateral and ventral tubules. Procercus and anal tubules present (Wiederholm, 1983; Moller Pillot, 1984a).
Head
Antenna
The antenna consists of 7 segments. The blade is shorter than the flagellum. Lauterborn organs absent Demicr antenna.
Mentum
The mentum is concave with one very broad pale median tooth and 7 pairs of brown lateral teeth Demicr mentum. The ventromental plates as wide as or wider than the mentum.
Labrum
SI is simpel and labral lamellae are absent. The pecten epipharyngis is a triangular scale with distal teeth. The premandible has 4 apical teeth.
Mandible
The mandible without a dorsal tooth, apical tooth with 2 inner teeth, The pecten mandibularis is consists of 3 lamellae and seta interna with only 2 lamellae.
Differential characteristics
The combination of a concave mentum with 7 pairs of lateral teeth Demicr mentum and a 7 segmented antenna Demicr antenna separates Demicryptochironomus from all other genera.