Three species of heteronemerteans from the Great Barrier Reef province of Australia are described and illustrated. These are Baseodiscus delineatus (Delle Chiaje 1825), Baseodiscus hemprichii (Ehrenberg 1831) and Baseodiscus quinquelineatus (Quoy & Gaimard 1833). Baseodiscus hemprichii has not previously been reported from Australia. For all three species a full list of known locations is provided.
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Ray Gibson (1979) studied this question.
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