Key to genera of the Tribe RAPHIDASCARIDINEA Chabaud, 1965

1 Intestinal caecum absent; ventricular appendix present; interlabia absent; lips usually not longer than wide; parasitic in teleost fishes.................................................................................... Raphidascaris

- Intestinal caecum present; ventricular appendix present; interlabia present; lips large, with anterior region forming distally broadened process internally supported by pair of longitudinal thickenings; parasitic in teleost fishes..... Hysterothylacium