This is an introduced European species of earthworm. Reynolds (1977) provides the following description: “Length 90-150 mm, diameter 6-9 mm, segment number 150-222, prostomium, epilobic, first dorsal pair 12/13. Clitellum xxvii, xxviii-xxxiv, xxxv. Tubercula pubertatis xxxii-xxxiv. Setae closely paired, posteriorly
AA:AB:BC:CD = 60:7:28:5;
a and
b in form of genital setae on genital tumescences in ix, x, xi, xxxi, xxxiii, xxxiv, and sometimes xii. Male pores on xv with elevated glandular borders, sometimes extending to xiv and xvi. Seminal vesicles, four pairs in 9-12, the anterior pairs smaller. Spermathecae, two pairs with short ducts opening on level
c in 9/10 and 10/11. Colour, grey or brown with slight iridescence dorsally. Body cylindrical and dorsoventrally flattened posteriorly.”
Source:
Reynolds, John W. 1977.
The Earthworms (Lumbricidae and Sparganophilidae) of Ontario. Life Science Miscellaneous Publications,
Royal Ontario Musuem, Toronto, with permission.