Skuse, 1889
Body
Medium sized larvae with a length up to 11 mm. Living larvae are yellowish, brownish, greenish or red with white spots. The fringe of swimming hairs is present (Moller Pillot, 1984a).
Head
The head length is 0.60 - 0.85 mm with a cephalic index of 80 - 85% (Moller Pillot, 1984a).
Antenna
The antennal segments are all yellow and the antennal ratio is 3.5 - 5.0. The ring organ is situated at 0.6 - 0.7 of the height of the first segment. The second segment is normal and lacks a tuning fork (Wiederholm, 1983; Moller Pillot, 1984a).
Mentum
Dorsomentum with a row of 6 - 8 teeth on each side.
Ligula and paraligula
Ligula with 5 black teeth in a concave row. Paraligula in the form of a holly leaf (Ilex) Pro ligula.
Mandible
The mandible has a large basal tooth.
Maxilla
The maxilla is short with an undivided basal segment.
Anal tubules
4 anal tubules which are longer than wide.
Posterior parapods
All claws on posterior parapods yellow with of without teeth on their inner margin.
Differential characteristics
The black teeth of the strongly concave ligula is distinctive Pro ligula.
Diversity
European species: 21
Treated species: 0