Kieffer, 1913
Body
Small larvae up to 5 mm long. Living larvae are yellowish. The anterior and posterior parapods are separate and bear rows of claws Nanocl bic claws ant pp. Procercus well developed and sclerotized caudally. Two pairs of anal tubules are present (Wiederholm, 1983; Moller Pillot, 1984b).
Head
The head length up to 0.4 mm (Moller Pillot, 1984b).
Antenna
The antenna consists of five segments. The blade is shorter than the flagellum. Lauterborn organs are conspicuous.
Mentum
The mentum has two median teeth and usually 6 pairs of lateral teeth Nanocl rectin mentum. Sometimes the lateral teeth are hardly discernable (N. balticus). The ventromental plates are exceptionally long and narrow. The beard is absent.
Labrum
The pecten epipharyngis consists of three spines, The SI is simpel and the premandible has 1 - 5 apical teeth (Wiederholm, 1983; Moller Pillot, 1984b).
Mandible
The mandible has a very long apical tooth and 3 inner teeth Nanocl bic mandible. The seta interna has branches (Wiederholm, 1983).
Differential characteristics
The exceptionally long ventromental plates are distinctive Nanocl rectin mentum. Prodiamesinae also have very large ventromental plates, but these are usually covered with setae and their body are much larger than that of the small Nanocladius larvae.
Diversity
European species: 5
Treated taxa:
Species-group Nanocladius bicolor agg.
Nanocladius balticus
Nanocladius rectinervis