Dichogaster (Dichogaster) greeffi Michaelsen, 1902

Csuzdi, Csaba, 2005, Earthworms (Annelida: Oligochaeta) of Sao Tomé, Journal of Natural History 39 (33), pp. 3039-3058 : 3040

Dichogaster (Dichogaster) greeffi Michaelsen, 1902

( Figures 1–3 )

Dichogaster greeffi Michaelsen 1902, p 20 .

Dichogaster greeffi: Cognetti 1910, p 83 .

Dichogaster (Dichogaster) greeffi: Csuzdi 1995, p 109 , part.

Material examined

AF/5066 three ex. Sao Tome´, OBO National Park, leg. J. Measey, October 2002.

Diagnosis

L. 90–95 mm, D. 4–4.5 mm, number of segments 125–132. Colour alive unknown, conserved brownish. First dorsal pore in 13/14. Clitellum 13–20, prostatic pores in segment 17, 19, spermathecal pores in 7/8, 8/9 ( Figure 1 ). Spermathecae skittle-shaped, duct short muscular, diverticula acinous ( Figure 2 ). Calciferous glands three pairs in 15– 17, but the first pair is very small. Meronephridia six or seven on each side of the intestine. Penial setae uniform, the fully adult seta 1.3–1.4 mm long and in the middle 0.02 mm wide. The ectal third of the seta slightly undulated and the tip is sharply hooked. Each seta bears a characteristic ornamentation of large slightly abutting scales ( Figure 3 ).

Figures

Figure 1. D. (D.) greeffi, ventral side of the clitellum.

Figure 2. D. (D.) greeffi, spermatheca.

Figure 3. D. (D.) greeffi, penial seta: (a) whole seta; (b) middle part of the seta with the characteristic ornamentation; (c) tip of the seta.