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Family  Gastropteridae

This is a family of fairly small species popularly known as bat wing slugs. The sides of the foot are expanded as parapodia which are used for swimming. The animals are usually brightly coloured with an internal shell that is small in relation to the animal size. If a shell is present it is either minute and attached at the rear of the animal or larger covering the internal organs. There are two species in NSW, which live in association with the sponge Dysidea.

Sagaminopteron ornatum Tokioka & Baba, 1964

Sagaminopteron psychedelicum Carlson & Hoff, 1974

These species are illustrated on the Sea Slug Forum.