Key to species of Affecauda Hall & Chambers, 1999

1 Oesophagus not looped; ovary intertesticular; Laurer’s canal exits dorsal to ovary....... .............................................................................. A. annulata Hall & Chambers, 1999

– Oesophagus looped; ovary pretesticular; Laurer’s canal exits dorsal to posterior testis. ....................................................................................................................................... 2

2 Tegumental annulations extend from level of oesophagus to immediately anterior to ventralsucker;oesophagealbulbdistinctlysmallerthanpharynx;seminalvesicleunipartite ............................................................................................... A. rugosa n. sp. (Figure 1)

– Tegumental annulations restricted to small patch at level of posterior testis, immediately anterior to ventral sucker; oesophageal bulb approximately same size as pharynx; seminal vesicle bipartite .................................................. A. salacia n. sp. (Figures 2–3)