Kieffer, 1911
Body
Medium sized to large larvae up to 10 mm long. The anterior parapods are fully separated. The two posterior parapods bear rows of claws. The procercus is present and only weakly sclerotized. Two pairs of anal tubules present (Wiederholm, 1983; Moller Pillot, 1984b).
Head
The head length of the described Dutch species is 0.35 - 0.50 mm (Moller Pillot, 1984b).
Antenna
The antenna consists of five segments. The blade is subequal to the flagellum. Lauterborn organs are conspicuous Chae piger agg antenna.
Mentum
The mentum has one broad median tooth and 5 pairs of lateral teeth Chae piger agg mentum; Chae sp Veluwe mentum The ventromental plates are strong.
Labrum
The pecten epipharyngis consists of three spines of different length, SI is plumose or branched. Between the SI a pairs labral lamellae is situated Chae g vitell labrum Chae sp Herkenbosch labrum. The premandible has two apical teeth (Wiederholm, 1983; Moller Pillot, 1984b).
Mandible
The mandible with an apical tooth and 3 - 4 inner teeth. The seta interna has serrate branches (Wiederholm, 1983).
Differential characteristics
The combination of the presence of labral lamellae Chae piger agg labrum and branched or plumose SI, 5 pairs of mentum teeth and large ventromental plates Chae piger agg mentum are distinctive for Chaetocladius.
Diversity
European species: 20
Treated taxa:
Species-group Chaetocladius dentiforceps agg.
Species-group Chaetocladius piger agg.
Species-group Chaetocladius gr. vitellinus
Species-group Chaetocladius gr. acuticornis
Chaetocladius melaleucus
Chaetocladius sp. Herkenbosch