Syllinae (Polychaeta, Syllidae) from Australia. Part. 2. Genera Inermosyllis, Megasyllis n. gen., Opisthosyllis, and Trypanosyllis Author Martín, Guillermo San Departamento de Biología (Zoología), Laboratorio de Biología Marina e Invertebrados, Facultad de Ciencias, Universidad Autónoma de Madrid, Canto Blanco, 28049 Madrid, Spain. E-mail: guillermo. sanmartin @ uam. es, maite. aguado @ uam. es Aquatic Zoology, The Australian Museum, 6 College Street, Sydney, NSW, 2010 Australia. E-mail: pat. hutchings @ austmus. gov. au Author Hutchings, Pat Author Aguado, María Teresa Departamento de Biología (Zoología), Laboratorio de Biología Marina e Invertebrados, Facultad de Ciencias, Universidad Autónoma de Madrid, Canto Blanco, 28049 Madrid, Spain. E-mail: guillermo. sanmartin @ uam. es, maite. aguado @ uam. es Aquatic Zoology, The Australian Museum, 6 College Street, Sydney, NSW, 2010 Australia. E-mail: pat. hutchings @ austmus. gov. au text Zootaxa 2008 2008-08-01 1840 1 53 journal article 1175­5334 Key to the Australian species of Trypanosyllis 1. Body usually strongly pigmented, with two transversal pink to red bands on each anterior segment. Compound chaetae distinctly bidentate, with a marked dorso-ventral gradation in length of blades................... ...................................................................................................................................... Trypanosyllis zebra - Body without a colour pattern. Compound chaetae bidentate, with small proximal tooth, almost unidentate; blades all similar in length ................................................................................... Trypanosyllis aeolis