Libyodrilus Beddard, 1891

Clausen, Martha Weis, 2004, Description of seven new species of Libyodrilus Beddard from Cameroon, with a key to the species of the genus (Oligochaeta: Eudrilidae), Journal of Natural History 38 (15), pp. 1851-1880 : 1878-1879

Key to all species of the genus Libyodrilus Beddard, 1891

1 Spermarial pores paired, within ab (figure 8B)....... L. choristoporus

– Spermarial pore(s) single or closely paired (not more than ab apart within aa).. 2

2 Genital field with a yellow glandular swelling between d on segment 17 (figure 7B)..................... L. platybrachyoncus

– Genital field not as above.................. 3

3 Genital field with furrow m/v between 19/20 and eq 14 (figure 7D). L. kamerunensis

– Genital field not as above.................. 4

4 Genital field with an oval, longitudinal swelling covering all or part of area from just anterior to setal zone of 18 and to setal zone of 16 between b (figure 8D) L. mekoensis

– Genital field not as above.................. 5

5 Euprostatic pore on a cone on a circular swelling reaching 16/17 and setal zone of 18 within c (figure 8E)................ L. edeaensis

– Euprostatic pore(s) on a circular or oval swelling on 17 between a or b .... 6

6 Spermarium without diverticula................ 7

– Spermarium with one to three pairs of diverticula........... 8

7 Proandric. Penial setae as figure 6A........... L. crassisetus

– Holandric. Penial setae as figures 5C, 6G, H........ L. tenuisetus

8 Spermarium forming one ring including nerve cord and oesophagus in segment 13 (figure 10A, B).................. L. simsi

– Spermarium forming two rings, one around nerve cord and one around oesophagus in segment 13...................... 9

9 Penial setae with groove (figures 5D, 6I, J)......... L. violaceus

– Penial setae without groove................ 10

10 Male pore unpaired. Penial setae almost straight and cylindrical (figure 6B) L. maryae

– Male pore paired. Penial setae curving and tapering towards ectal end (figure 5A)...................... L. bipindiensis