Dysponetus species are small fragile and easily overlooked in normal handling of samples. They are characterized by circular notosetae, mouth appendage, single pygidial projection, and accessory simple neurosetae.
Dahlgren, T.G. 1996. Two new species of Dysponetus (Polychaeta: Chrysopetalidae) from Italy and Papua New Guinea. Proceedings of the Biological Society of Washington 109(3): 575-585. available online athttp://www.biodiversitylibrary.org/page/34645182