(Beddard, 1908)
Description
Middle-sized worms. External secondary annulation beginning from III. Chaetae two per bundle, sigmoid with nodulus, simple-pointed. Male pores in X on porophores, spermathecal pores in XI and XII. Pharyngeal glands reaching to VIII. 3-5 pairs of simple transversal vessels in posterior segments. The second pair of vasa deferentia limited to X, not penetrating dissepiment 10/11. Atria represented with roundish ampulla terminating in small penis lying in large penial sac; the latter of about the same length as atrial ampulla. Atrial musculature moderately thick (up to 10 µm). Two pairs of spermathecae with prolonged roundish ampulla, and distinct duct. Segment number known as 76. Differing from congeners mostlyin the combination of the internal characters. A principal difference from the widely distributed Trichodrilus allobrogum is that in Trichodrilus cantabrigiensis vasa deferentia do not penetrate 10/11.
Burrowing in sediment.
Distribution
England.
Ecology
In freshwater, groundwater.
Reproduction
Sexual only. Eggs laid in cocoons.
Literature
Beddard, 1908: 365-369; Cook, 1967: 362-363, Fig. 7b,e; Cook, 1971a: 228, Fig. 5.11B; Kasprzak, 1981: 203-204, Figs 817-818.