(Kieffer, 1912)
Body
Small larvae up to 5 mm long. Larvae greenish. The anterior and posterior parapods are separate and bear rows of claws. Procercus is as high as wide and two pairs of anal tubules present (Wiederholm, 1983; Moller Pillot, 1984b).
Head
The head length is 0.27-0.34 mm (Moller Pillot, 1984b; Schmid, 1993). The eye consists of 3 completely fused, but discernable eyes Parak gr bathophila head 8.
Antenna
The antenna consists of five segments. The blade is shorter than the flagellum. Lauterborn organs are weak or absent.
Mentum
The mentum has one median tooth and 6 pairs of lateral teeth. When the mentum is worn the small first lateral teeth may disappear Parak gr. bathophila 2 mentums. The median tooth and the first pair of laterals are yellow. The other lateral teeth ar brown. The ventromental plates are distinct but do not cover lateral teeth. The beard is absent.
Labrum
The pecten epipharyngis consists of three subequal scales, SI is branched. (Wiederholm, 1983; Moller Pillot, 1984b).
Mandible
The mandible has a pale apical tooth and 3 brown inner teeth. The seta interna has simpel branches (Wiederholm, 1983).
Differential characteristics
The branched SI and the mentum with 6 pairs of lateral teeth, without beard Parak gr bathophila mentum separates Parakiefferiella from all other Orthocladiinae.
P. bathophila can be separated from other Parakiefferiella by the paler central part of the mentum. Also the branched SI is distinctive.