(Goetghebuer, 1921)
Body
Small larvae up to 5 mm long. Living larvae are dark purple to almost black. Ethanol preserved specimens remain purple. The lateral setae of the body are very long and about as long or longer than the length of the segment Paralimn hydr body setae. The anterior and posterior parapods are separate and bear rows of claws. Procercus and two pairs of anal tubules present (Wiederholm, 1983; Moller Pillot, 1984b).
Head
The head length is 0.3 mm (Moller Pillot, 1984b).
Antenna
The antenna consists of five segments. Segment 4 longer than segment 3. The blade is longer than the flagellum. Lauterborn organs are distinct Paralimn hydr antenna.
Mentum
The mentum has two larger median teeth and 5 pairs of lateral teeth. The ventromental plates are weak. The beard is absent Paralimn hydr mentum.
Labrum
The pecten epipharyngis consists of three subequal scales, SI is simpel and the premandible has two apical teeth an two inner teeth (Wiederholm, 1983; Moller Pillot, 1984b).
Mandible
The mandible has an apical tooth and 4 inner teeth. The seta interna has fine branches (Wiederholm, 1983).
Differential characteristics
The color of the body and the long lateral setae Paralimn hydr body setae separate Paralimnophyes from all other Orthocladiinae.