(Edwards, 1924)
Body
Small larvae up to 3 mm long. The thorax has only two segments. The body setae are much shorter than the segment. 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 0.227 - 0.280 µm (Schmid, 1993).
Antenna
The antenna consists of five segments. The first antennal segment 90 µm. The blade is short and the Lauterborn organs are small.
Mentum
The mentum has three median teeth and 5 pairs of lateral teeth Thienen clav mentum pict. The ventromental plates are weak. The beard is absent.
Labrum
The pecten epipharyngis consists of three triangular spines, SI is weak and the premandible has one apical tooth (Wiederholm, 1983; Moller Pillot, 1984b).
Mandible
The mandible has one apical tooth and 4 inner teeth. The seta interna has plumose branches (Wiederholm, 1983).
Differential characteristics
The antenna of Thienemanniella is distinctive, shorter than the antenna of Corynoneura and not on a pedestal like Heterotanytarsus Antenna half headlength.
T. vittata can be separated from the other Thienemanniella by the three median mental teeth of which the middle one is not projecting over the other median teeth. The first lateral teeth are not reduced Thienen clav mentum pict. The short body setae and the first antennal segment 90 µm.