Eusyllis Malmgren, 1867

Brusa, Vivian S., Aguado, M. Teresa, Martín, Guillermo San & Rouse, Greg, 2013, Revision of the genus Eusyllis Malmgren, 1867 (Annelida: Phyllodocida: Syllidae: Eusyllinae), with the description of a new species from the eastern Pacific Ocean, Zootaxa 3599 (1), pp. 37-50 : 41

Genus Eusyllis Malmgren, 1867

Desmosyllis Verrill, 1900: 635 . Eudontosyllis Knox, 1960: 105 .

Type species. Eusyllis blomstrandi Malmgren, 1867 .

Diagnosis ( San Martín & Hutchings 2006 emended). Body small to mid-sized, cylindrical in section, ventrally flattened, with numerous segments. Dorsal ciliary bands in some species. Prostomium with four eyes and sometimes two anterior eyespots. Palps well developed, free at their basis or slightly basally fused. Three antennae. Nuchal organs as two ciliated, semicircular grooves; ciliation usually extending to lateral areas of prostomium. Two pairs of tentacular (peristomial) cirri. Antennae, tentacular cirri and dorsal cirri elongated, smooth or irregularly articulated. Ventral cirri digitiform; first one sometimes flattened, laminar. Pharynx straight, with a median, dorsal pharyngeal tooth and a usually incomplete, ventral denticled arc with numerous small teeth, absent dorsally (except in some specimens of certain species). Compound heterogomph chaetae on all parapodia. Simple dorsal and ventral chaetae in some posterior parapodia. Reproduction by epigamy; bioluminescent during reproductive period.

The genus includes eight species including the new one herein described.