Lepocreadiidae (Digenea) of Australian coastal fishes: new species of Opechona Looss, 1907, Lepotrema Ozaki, 1932 and Bianium Stunkard, 1930 and comments on other species reported for the first time or poorly known in Australian waters

Opechona austrobacillaris n, sp. is described from Pomatomus saltatrix from marine sites off Western Australia and New South Wales, Australia. It diff ers from O. bacillaris in its elongate outline, small ventral sucker, longe r pseudoesophagus (relative to the oesophagus), relatively shorter ventral sucker to ovary distance and the relatively longer post-testicular region. Lepotrema monile n. sp. is described from Pomacentrus wardi from Heron Isla nd, Queensland. It differs from its congeners in the sphincter around the d istal metraterm and the more-or-less oval ovary. Bianium spongiosum n. sp, is described from Ostracion cubicus from Lizard Island, Queensland. It diff ers from its congeners in lacking lateral flaps in the forebody, but in hav ing large, internal spongiform patches in the lateral forebody. The followi ng species are redescribed from Australian sites: Lepocreadium oyabitcha fr om Abudefduf whitleyi, Lizard Island; Clavogalea trachinoti from Trachinotu s botla, Heron Island and T. coppingeri, New South Wales, Stradbroke Island , Queensland and Heron Island; Myzoxenus insolens from Notolabrus parilus, Western Australia; Bulbocirrus aulostomi from Aulostomus chinensis, Heron I sland; Lepocreadioides orientalis [new synonyms: Bicaudum interruptum Bilqe es, 1973; Lepocreadioides interruptum (Bilqees, 1973) Madhavi, Narasimhulu & Shameem, 1986; Lepocreadioides discum Wang, 1986; Lepocreadioides sp. of Karyakarte & Yadav (1976)] from Cynoglossus bilineata, Moreton Bay, Queensl and; Hypocreadium patellare from Sufflamen chrysopterus, Heron Island; Eche neidocoelium indicum from Echeneis naucrates, Heron Island; Multitestis pyr iformis from Epinephelus cyanopodus, Heron Island; Pseudopisthogonoporus vi tellosus from Naso brevirostris, Heron Island; and Bianium hispidum from To rquigener whitleyi and T. pleurogramma, southern Queensland. Only M. solens and M. pyriformis have been reported from Australian waters before; both a re new host records.