Pseudanisakis Layman & Borovkova, 1926

Synonyms: Eustoma van Beneden, 1871; Anacanthocheilus Wülker, 1930; Pseudanisakis Yamaguti, 1941; Metanisakis Mozgovoi, 1950

Generic diagnosis (after Gibson 1973). Acanthocheilidae . One dorsal lip and two subventral lips (Fig. 72 A), each with two papillae. Interlabia absent. Amphid present on subventral lips. Oesophagus long and narrow. Ventriculus oval or oblong, not round (Fig. 72 B). Ventricular appendix and intestinal caecum absent. Excretory pore just posterior to nerve ring. Anal glands absent. Male tail conical; normally six to nine pre-cloacal papillae on each side with five ad-cloacal or post-cloacal pairs of papillae. Spicules equal. Ejaculatory duct distinct and glandular; gubernaculum absent (Fig. 72 C). Male P. tricupola from Amblyraja radiata 5.9–57.0 long. Female tail tapers to sharp point (Fig. 72 D). Vulva situated in anterior half of body posterior to the ventriculus. Female P. tricupola from A. radiata are 5.9–34.5 long. Parasites of rays.