Hrabe, 1938
Description
Middle-sized worms. Prostomium short. External secondary annulation, with shorter anterior ring, in forebody well expressed. Chaetae two per bundle, sigmoid with nodulus, simple-pointed, 126-189 µm long; dorsal chaetae shorter than ventral ones. Male pores in X, spermathecal pores in XI and XII, clitellum in X-XIII. Pharyngeal glands in IV-VIII. Chloragogen tissue on oesophagus beginning from the hind portion of VI. No transversal vessels in postclitellar segments. Atria pyriform, with very thick (23-40 µm) muscular layer, terminating in small penis. Two pairs of spermathecae with long ampulla and short duct. Length 30 mm, segment number known as 73. Differing from congeners mostly in the combination of the internal characters.
Burrowing in sediment.
Distribution
France.
Ecology
In freshwater, rare.
Reproduction
Sexual only. Eggs laid in cocoons.
Literature
Hrabe, 1938: 80-84, Figs 9-10; Cook, 1971a: 228-229, Fig. 5.11F; Kasprzak, 1981: 204, Figs 822-823.