Fig. 3 in An annotated key separating foreign earthworm species from the indigenous South African taxa (Oligochaeta: Acanthodrilidae, Eudrilidae, Glossoscolecidae, Lumbricidae, Megascolecidae, Microchaetidae, Ocnerodrilidae and Tritogeniidae)

Fig. 3. Microscolecine arrangement, schematic: one pair of prostatic pores in 17 or 19, male pores may occur in segment 17 or 18, or be absent; spermathecal pores may be single pair with pores in 7/8 or 8/9, or two pairs in 7/8 and 8/9, or absent.