Description of seven new species of Libyodrilus Beddard from Cameroon, with a key to the species of the genus (Oligochaeta: Eudrilidae) Author Clausen, Martha Weis text Journal of Natural History 2004 2004-08-31 38 15 1851 1880 http://dx.doi.org/10.1080/00222930310001613575 journal article 10.1080/00222930310001613575 1464-5262 Libyodrilus platybrachyoncus n. sp. (figures 6E, 7B, 9C, D) Material examined Type material. Cameroon , 13 miles E of Kribi , 2 ‡ 57 ’ N, 9 ‡ 55 ’ E at Kribi- Akom II road, in wet soil on bank of small stream, 11 January 1966 , coll. M. W. Clausen [ holotype : one clitellate, ZMUC OLI-7 ; paratypes : one clitellate (badly damaged), one juvenile , all ZMUC OLI-8 ] . Additional material. Cameroon , 14 miles E of Kribi at Kribi-Akom II road, wet soil on bank of small stream, 11 January 1966 , coll. M. W. Clausen (one clitellate with hind end damaged, ZMUC OLI-9 ) . External characters (figure 7B) HOLOTYPE : length 125 mm , maximum diameter of all three clitellate specimens 4.5 mm , number of segments of type 166. Annulation: segment 9 bi-annulate, 10 tri-annulate, 11–13 and 18–20 multi-annulate, annulation posterior to 20 gradually fading away. Prostomium prolobous. Clitellum orange, genital swellings yellowish, rest of body without pigment. Setae uniform and closely paired. Setal formula: aa : ab : bc : cd ~ 8.0:1.0:5.5:1.0, dd ~ two-thirds of body circumference at segment 10; 5.5:1.0:4.0:1.0, dd ~ two-thirds of body circumference at segment 30. Clitellum annular, with 3 K segments in segments 14–1/2 17, replaced by genital swelling ventrally in posterior half of 17 (see below). No dorsal pores. Nephridiopores not discernible. Spermarial pore unpaired, transverse slit (length about 1 1/2 ab ) m/v in 13 just behind setal zone. Slit surrounded by low swelling (width about 1/2 aa , length a little less). Female pores paired, minute openings on segment 15 between setal zone and 15/16, dorsal to d , distance to d ~ 1–4 cd . Male pores closely paired, m/v in 17 between eq and 17/ 18 in type . The pores are situated on yellow glandular swelling (clearly distinctive from clitellar tissue) covering or almost covering area between setal lines d on anterior half of segment 17. Penial sacs opening together with euprostates.