The genus Syllis Savigny in Lamarck, 1881 (Annelida: Syllidae: Syllinae) from Australia (Part 3): new species and redescription of previously described species.

Syllis Savigny in Lamarck, 1818, the type genus of Syllidae, is the largest and most diverse within the family. This genus presents many taxonomic, biogeographic, and phylogenetic problems due mainly to the lack of molecular data and morphological synapomorphies for many of the species, but also due to poor or inadequate descriptions. In order to improve the knowledge of the genus, we have undertaken a morphological revision of Australian species, based on type material and material collected over years by the Australian Museum. This is the third paper dealing with this family. Eighteen species are herein described, of which five are new and twelve are redescriptions of already known species, with four new combinations: Syllis imajimai, n. sp.; S. narranuk, n. sp.; S. noolinga, n. sp.; S. similisunzima, n. sp.; S. thylacine, n. sp.; S. busseltonensis (Hartmann-Schröder, 1982) n. comb.; S. patriciae (Hartmann-Schröder, 1981) n. comb.; S. pharobroomensis (Hartmann-Schröder, 1979) n. comb., S. pharynxcircunfusata (Hartmann-Schröder, 1979) n. comb, S. armillaris (O. F. Müller, 1771); S. augeneri Haswell, 1920; S. benelihauae (Campoy & Alquézar, 1982); S. hyalina Grube, 1863; S. cf. nigrescens Grube, 1878; S. profunda Cognetti, 1955; S. truncata Haswell, 1920; and S. variegata Grube, 1860.

Three new species of Syllis Savigny in Lamarck, 1818 (Annelida, Syllidae) from Chilean Patagonia.

Three new species of the genus Syllis Savigny in Lamarck, 1818, from the Chilean Patagonia are described, figured and discussed. The specimens were collected in boulders, sediment bottoms, Macrocystis pyrifera holdfasts, and inside tubes of Chaetopterus cf. variopedatus. Syllis patagonica n. sp., is characterized by its color pattern, short, fusiform dorsal cirri, plenty of hyaline inclusions, acuminate posterior acicula, and compound chaetae with slightly bidentate falcigers. Syllis terraeignium n. sp., has similar compound chaetae, but dorsal cirri are longer than those of the above mentioned species, a long proventricle, and the posterior acicula are straight, pointed. Finally, Syllis patersoni n. sp., has a slender, elongated body, with moderately long dorsal cirri, plenty of hyaline inclusions, acuminate posterior acicula, and compound chaetae composed by falcigers and short spiniger-like.