(Meigen, 1818)
Body
Medium sized larvae. Living larvae greenish red. Claws on the posterior parapods are simpel. One small pair of ventral tubules on the 11th segment. Procercus and anal tubules present (Wiederholm, 1983; Moller Pillot, 1984a).
Head
The head capsule is shining. Anterior margin of frontal apotome is concave with an oval pit, a little longer than wide Dicr nota frclyp 8. Labral sclerites 1 and 2 are separate.
Antenna
The antenna consists of 5 segments. The blade is subequal to or shorter than the flagellum. Segment 4 is unusually long, much longer than segment 3. Lauterborn organs distally on the second segment.
Mentum
The mentum has one crenate median tooth and 5 pairs of lateral teeth. The ventromental plates are narrow, triangular Dicr not ment 8.
Labrum
SI is plumose and labral lamellae a large scale with numerous spines. The pecten epipharyngis consists of 9 spines. The premandible has two apical teeth and one blunt inner tooth (Contreras-Lichtenberg, 1986).
Mandible
The mandible with one pale dorsal tooth, an apical tooth with 3 inner teeth. The seta interna with 4 plumose branches (Wiederholm, 1983; Contreras-Lichtenberg, 1986).
Differential characteristics
The combination of a single median mental tooth Dicr nervosus mentum, ventromental plates narrower than mentum. Pecten epipharyngis with 10 teeth and a concave frontal apotome separate Dicrotendipes from all other genera. Dicrotendipes lobiger with a convex frontal apotome can be separated by the large pit and crenate anterior margin of the frontal apotome, the single median mental tooth and ventromental plates narrower than mentum.
D. notatus can be easely separated from the other Dicrotendipes species by the ventral pair of short tubules on the 11th segment.