Holostephanus dubinini is a species of parasitic trematode in the family Cyathocotylidae.
Hosts Holostephanus dubinini uses several fish and molluscs as intermediate hosts:
Common bream (Abramis brama) Common bleak (Alburnus alburnus) Faucet snail (Bithynia tentaculata) Gudgeon (Gobio gobio) Guppy (Poecilia reticulata) Sunbleak (Leucaspius delineatus) Tench (Tinca tinca) Common roach (Rutilus rutilus) It has only one definitive host, the great cormorant (Phalacrocorax carbo).
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