Dr. Murai Éva - Gubányi András szerk.: Parasitologia Hungarica 28. (Budapest, 1995)

ani, because recently Shimazu (1994) has pointed out that the actual existence of the ani is rather rare in species of Diploproctodaeum and Bianium studied; it can be variable even in specimens belonging to the same species. As these states, on which the creation of the genus Diplocreadium was based upon, are variable, the present author regards that genus as a synonym of Diploproctodaeum. Travassos, Freitas and Biihrnheim (1965) described the genus Amarocotyle for the species A. simonei on the basis of the absence of the vesicula seminalis interna and the shape and position of the testes. As these characters seem to be variable (See above) and as the general body structure is similar to that of the genus Bianium, hence, agreeing with Yamaguti's opinion (1971), Amarocotyle should be suppressed to a synonym of Bianium. The genus Cotylocreadium was created by Madhavi (1972) for diplocreadid speciemens collected in Triacanthus strigilifer and they were regarded to be conspecific with D. triacanthi Hafeezullah, 1970. Madhavi (1972) described a "peculiar course of the caeca" attributing to it considerable generic value. If this character is indeed a valuable trait, then it is rather of specific importance because it is not found in Hafeezullah's (1970) species. Other characters reported (body shape, position of cirrus pouch etc.) fall in the category of species variability. Therefore, this genus is regarded by the present author to be a synonym of the genus Diploproctodaeum. Bearing in mind the generic diagnostic characters of the genera Diploproctodaeum and Bianium formulated here and the conclusions concerning the revised genera, in the present author's opinion these genera comprise the following valid species: Diploproctodaeum La Rue, 1926 Syns Diploporus Ozaki, 1928 (in part), Diplocreadium Park, 1939, Cotylocreadium Madhavi, 1972 D haustrum (MacCallum, 1919) La Rue, 1926 D. cryptosoma (Ozaki, 1928) Sogandares-Bernal and Hutton (1958) D. koreanum (Park, 1939) n. comb. Syn. Diplocreadium koreanum Park, 1939 D. triacanthi (Hafeezullah, 1970) n. comb. Syns Diplocreadium triacanthi Hafeezullah, 1970, Cotylocreadium triacanthi (Hafeezullah, 1970) Madhavi, 1972 D. diodontis Nahhas et Cable, 1964 D. bombayensis (Gupta, 1968) n. comb. Syn. Bianium bombayensis Gupta, 1968 D. ghanense (Fischtal et Thomas, 1970) Nasir, 1976 Syn. Bianium ghanense Fischtal et Thomas 1970 D. oviforme Shimazu, 1989 D. hakofuqu Shimazu, 1989 Remarks: D diodontis Nahhas et Cable, 1964 should be excluded from this geus due to its diverse gross-morphology and internal anatomy even if with the presence of the ani. The latter character is not a valuable generic or specific character (see above) although it had emerged several times during the evolution of trematodes (Ozaki 1925, 1928, Stunkard 1931) in phylogenetically removed trematodes. It is rather similar to the members of the genus Pseudocreadium Layman, 1911 or it should be placed into a newly created genus.