1. Esophageal region, ventral view. 2. Male tail, lateral view. 3. Male tail, dorsoventral view. 4. Tail of female. 5. Genital cone, lateral view. 6. Fused spicule tips of male. 7. Tip of genital cone, ventral view.

Figures 8-11

Diagnosis and discussion	# Key to species
C. radiatus	C. adersi
C. ashworthi	C. asini
C. auriculatus	C. brevicapsulatus
C. elongatus	C. elongatus kotlani
C. gyalocephaloides	C. insigne
C. leptostomum	C. nassatus
C. triramosus	C. ultrajectinus

Diagnosis and discussion
# Key to species	C. calicatus
C. minutus	C. hybridus
C. longibursatus	C. goldi
C. asymetricus	C. bidentatus

Trichonema aethiopicus	Trichonema aequatorialis
Trichonema maestrii	Trichonema symmetrum
Trichonema zavattarii	Crycophorus lutzi
Poteriostomum skrjabini	Craterostomum tenuicauda
Cylindropharynx rhodesiensis