THE SUBFAMILY AEPHNIDIOGENINAE YAMAGUTI, 1934 (DIGENEA, LEPOCREADIIDAE), ITS STATUS AND THAT OF THE GENERA AEPHNIDIOGENES NICOLL, 1915, HOLORCHIS STOSSICH, 1901, AUSTROHOLORCHIS N-G, PSEUDAEPHNIDIOGENES YAMAGUTI, 1971, PSEUDOHOLORCHIS YAMAGUTI, 1958 AND NEOLEPOCREADIUM THOMAS, 1960

The status of all of the putative member genera of the subfamily Aephn idiogeninae is reconsidered, based mainly on the morphology of the ter minal genitalia, Aephnidiogenes Nicoll, 1915 is the only genus retaine d in the Aaephnidiogeninae. Aephnidiogenes major Yamaguti, 1934 from D iagramma labiosum from the southern Great Barrier Reef is redescribed with particular reference to the terminal genitalia, and is shown to l ack a true cirrussac, a condition considered to be diagnostic of the A ephnidiogeninae. Holorchis Stossich, 1901 is placed in the subfamily L epidapedinae. Holorchis pycnoporus Stossich, 1901 from Pagellus acarne from off Spanish Sahara and from Diplodus vulgaris from off Italy and H. legendrei Dollfus, 1946 from Sparodon durbanensis and D. sargus fr om off eastern Cape Province, South Africa and from Pagellus erythrinu s from the Adriatic Sea and Italy are studied and illustrated. The ter minal genitalia of H. pycnoporus are found to be enigmatic, but those of H. legendrei are found to fit clearly into the 'Lepidapedon-like' p attern. A new genus Austroholorchis is erected in the Lepidapedinae, w ith A. sprenti (Gibson, 1987) n. comb. as the type-species. Its diagno stic features are its ani, infundibuliform oral sucker and the positio n of the ovary at about mid-level of the uterus. A. sprenti is illustr ated, its hosts in Queensland waters being Sillago maculata, S, analis and S. ciliata. A, levis n. sp. is described from Sillago bassensis f rom south-western Western Australia. The genus Pseudaephnidiogenes Yam aguti, 1971 is placed in the Lepidapedinae. P. rhabdosargi (Prudhoe, 1 956) from Rhabdosargus sarba from off Natal, South Africa is illustrat ed and the terminal genitalia of P. rhabdosargi from R. sarba and from R. holubi from off eastern Cape Province and Pseudaephnidiogenes voss i Bray, 1985 from Caffrogobius nudiceps from off eastern Cape Province , South Africa are illustrated. The genus Pseudoholorchis Yamaguti, 19 58 is placed in the subfamily Lepocreadiinae. The terminal genitalia o f P. pulcher (Manter, 1954) from Latridopsis ciliaris from New Zealand are illustrated, The genus Neolepocreadium Thomas, 1960 is placed in the Lepocreadiidae.