Kieffer, 1921
Body
Medium sized larvae up to 9 mm long. Claws on the posterior parapods are simpel. No lateral and ventral tubules (Wiederholm, 1983).
Head
Antenna
The antenna consists of 5 segments. The basal segment is shorter than the flagellum. Lauterborn organs absent.
Mentum
The mentum has two sometimes indistinct median teeth and 7 pairs of lateral teeth Harnischia mentum. The ventromental plates are about 0.8 times as wide as the mentum.
Labrum
SI is small and simpel and labral lamellae are absent. The pecten epipharyngis is a simpel plate distally trifid. The premandible has 6 teeth, 2 apical and 4 inner teeth Harnischia premand pec epi.
Mandible
The mandible without a dorsal tooth, apical tooth and 2 flattened inner teeth. The pecten mandibularis is absent and seta interna with 4 smooth and serrated branches.
Differential characteristics
The flat mentum with the paired median tooth Harnischia mentum, 5 segmented antenna without Lauterborn organs and no dorsal tooth on the mandible will separate Harnischia from all other genera.
Diversity
European species: 3
Treated species: 0