Polydora and related genera (Polychaeta, Spionidae) around Puerto Montt and Chiloe Island (Chile), with description of a new species of Dipolydora

A total of seven species of spionid polychaetes including one new species D ipolydora huelma were found from Puerto Montt and Chiloe Island (Chile). Po lydora cf. rickettsi, Dipolydora huelma sp. nov. and D. giardi were extract ed from self-excavated burrows in calcareous substrata: mollusc shells and coralline alga. Dipolydora socialis. Boccardia wellingtonensis. B. chilensi s and B. tricuspa were found from mud sand and sandstone intertidal flats. Boccardia wellingtonensis was re-examined, and Chilean specimens of B. poly branchia were re-examined and suggested that they may belong to B. wellingt onensis. Morphological variation, habitat, boring and crawling activity, ec ology, reproduction and development, and burrow structure of each species i s described and discussed.