Taxonomy of Some Tetraphyllidean Cestodes From Elasmobranch Fishes

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Abstract
Rhinebothrium pearsoni, sp nov., is described from Banks' shovelnosed ray, Aptychotrema banksii (Muller & Henle). PhyNobothrium orectolobi, sp. nov., is described from the wobbegong, Orectolobus maculatus (Bonnaterre). Anthobothrium amuleturn, sp nov., is described from the common shovel- nosed ray, Rhinobatos armatus (Gray). Pedibothrium ottleyi, sp. nov., is described from the zebra shark, Stegostoma tigrinum (Pennant), and the genus Pedibothrium Linton, 1909, is emended. Calliobothrium creeveyae, sp. nov., is described from the school shark, Galeorhinus australis (Macleay). Polypocephalus moretonensis, sp nov., is described from the estuary stingray, Dasyatis fluviorum Ogilby. Tylocephalum carnpanulatum, sp. nov., is described from the shark ray, Rhina ancylostomus Bloch & Schneider. Also described are a species of Balanobothrium Hornell, 1912, from S. tigrinum; a species of Cathetocephalus Dailey & Overstreet, 1973, and a species of Discocephalum Linton, 1890, from the black-tip shark, Carcharhinus spallanzani (Le Sueur), and Hornellobothrium cobraformis Shipley & Hornell, 1906, from the spotted eagle-ray, Aetobatis narinari (Euphrasen).