Dózsa-Farkas, 1990
Description
Small white worms. Chaetae by 3-8, most numerous in ventral bundles, sigmoid, simple-pointed, with ectal nodulus, lacking ventrally in XII, 30-35 µm long. Male pores in XII; clitellum in XII-1/2 XIII, rectangular clitellar glands arranged in transverse rows. Interior characters: Pharyngeal glands in two pairs; dorsal lobes at 4/5 and 5/6, connected or not with each other, ventral lobes in V and VI. Coelomocytes spindle-shaped, coarsely granular. Chloragogen tissue covering oesophagus beginning from V. No appendages on digestive tube. Blood colourless or slightly pink; dorsal blood vessel reaching backward up to XIII (sometimes only XII). Spermathecae in V, not connected with oesophagus. Spermathecal ampullae spherical, with sperm arranged in a transversal ring; ducts 1.5-3 times as long as ampullae; no glands at spermathecal pores. Male funnels pear-shaped, length twice as large as width, with much narrower collar. Vasa deferentia short, not dilatated in ectal end. Several separate large glands at male pore. 1-3 eggs in clitellar region. Length 1.5-2.8 mm, segment number 20-23. Can be distinguished from congeners only on the basis of internal anatomy.
Burrowing in sediment.
Distribution
Europe.
Ecology
In freshwater wetlands.
Reproduction
Sexual, with eggs laid in cocoons.
Literature
Dózsa-Farkas, 1990: 271-272, Figs 11-14; Rota and Healy, 1999: 34-35, Fig. 1D-E.