Sensu Moller Pillot, 1984b
Subgenus Psectrocladius
Body
Medium sized larvae up to 10 mm long. The anterior and posterior parapods are separate and bear rows of claws. Procercus weakly sclerotized with 2 - 5 small spurs Psec psilopterus procercus9. Two pairs of anal tubules present (Wiederholm, 1983; Moller Pillot, 1984b).
Head
The head length is appr. 0.5 mm (Moller Pillot, 1984b).
Antenna
The antenna consists of five segments. The blade is shorter than the flagellum. Lauterborn organs are small or absent.
Mentum
The mentum has one wide median tooth with 2 small projections Psec barbimanus mentum and 5 pairs of lateral teeth. The ventromental plates are large, covering some lateral teeth. The beard is distinct.
Labrum
The pecten epipharyngis consists of three subequal spined scales, SI is palmate Psec barbimanus S1 and the premandible has one apical tooth (Wiederholm, 1983; Moller Pillot, 1984b).
Mandible
The mandible has an apical tooth which is about 1.5 x as long as the combined inner teeth. The seta interna is present (Wiederholm, 1983).
Differential characteristics
The combination the palmate SI Psec barbimanus S1 on the labrum, beard present and procercus with spurs Psec psilopterus procercus9 is distinctive for the genus Psectrocladius.
P. barbimanus can be separated from the other Psectrocladius by the dome shaped mid-mental tooth with 2 small projections.