Dumnicka, 1983
Type species Krenedrilus papillatus Dumnicka, 1983
Number of species 4. One species known from NWE:
Krenedrilus sergei Giani et al., 1990
Description
Small tubificids, with smooth body. Hair and pectinate chaetae can be present in or absent from dorsal bundles. Ordinary ventral chaetae bifid, or both bifid and single-pointed. Single, highly modified, grooved genital chaetae at spermathecal and male pores; besides bundles of slightly modified bifid penial chaetae in XI, at male pores. An epidermal papilla present ventrally on spermathecal segment X. This papilla, as well as a unique set of two kinds of penial chaetae, one of them similar to spermathecal chaetae, distinguish Krenedrilus from the other genera of Tubificidae.
Burrowing in sediment.
Distribution
West Europe, Venezuela.
Ecology
In fresh, subterranean water.
Reproduction
Sexual only. Eggs laid in cocoons.
Literature
Dumnicka, 1983: 257; Giani et al., 1990: 56.