Diplobulbus brayi n. sp (Digenea : Opecoelidae) from Odax acroptilus (Perciformes : Odacidae) off Western Australia

Diplobulbus brayi n. sp. is described from the small intestine of Odax acro ptilus (Perciformes: Odacidae) from Point Peron in southern Western Austral ia. One of the five previously described species of Diplobulbus, D. vitello sus Bilqees, 1972 from Tetraodon lunaris (now Lagocephalus lunaris), is syn onymised with Alloheterolebes indicus (Gupta, 1968) Hafeezullah, 1971, whic h is known from the same host in the Indian Ocean. D. brayi n. sp. can be d istinguished from the remaining four species of Diplobulbus by the distinct interruption of the vitelline follicles at the ventral sucker, its more el ongate form and its long post-testicular space. Diplobulbus is so far restr icted to the Indo-Pacific region and appears to be stenoxenic to labroid fi shes. This is the first record of a trematode from an odacid fish.