Amblyosyllis Grube & Ørsted

Paresque, Karla, Fukuda, Marcelo Veronesi, Martín, Guillermo San & Nogueira, João Miguel De Matos, 2015, Amblyosyllis, Eusyllis, Odontosyllis, Perkinsyllis and Streptodonta (Annelida: Syllidae) from Brazil, with descriptions of two new species and new records for the country, Zootaxa 4000 (3), pp. 301-334 : 321

Genus Amblyosyllis Grube & Ørsted in Grube, 1858

Type species: Amblyosyllis rhombeata Grube & Ørsted in Grube, 1858, by monotypy.

Diagnosis. Body usually short, with few segments, slightly flattened dorsoventrally, with strong intersegmental constrictions. Palps short, usually shorter than prostomium, only basally fused, ventrally bent. Prostomium with three antennae, four eyes, and usually two anterior eyespots, sometimes located ventrally. Peristomium shorter than following segments, with two pairs of peristomial cirri; nuchal organs as one pair of dorsal épaullètes, usually ciliated, extending above dorsum for variable length. Antennae, peristomial and dorsal cirri throughout longer than body width, usually coiled, smooth to indistinctly articulated. Dorsal and ventral cirri with pigmented or iridescent inclusions. Ventral cirri large, usually inserted far from bases of parapodial lobes. Compound chaetae as heterogomph falcigers only, with bidentate blades; dorsal and ventral simple chaetae rarely present. Long and slender, convoluted pharynx; trepan with several teeth, central tooth absent. Proventricle relatively small. Pygidium with one pair of elongate anal cirri (cf. San Martín & Huchings 2006).

Remarks. Currently, this genus includes about 15 valid species ( San Martín & Aguado 2014). Amblyosyllis was first recorded for Brazilian waters and also for the Southern Atlantic by Nogueira (2000), in an unpublished Ph. D. Thesis. The autor found A. formosa Claparède, 1863 living in colonies of the scleractinian coral Mussismilia hispida ( Verril, 1868) off Ilha dos Alcatrazes, state of São Paulo, but that record most likely refers to another species, likely an undescribed new one (see Fukuda et al. 2015). More recently, Fukuda et al. (2015) reported the presence of A. granosa Ehlers, 1897 off the state of São Paulo.