Syllidae Grube, 1850

Fukuda, Marcelo Veronesi, Menezes-Moura, Andrezza Ribeiro, Guimarães, Carmen Regina Parisotto & Ruta, Christine, 2019, A new species of Exogone Ørsted, 1845 (Annelida: Syllidae: Exogoninae) from Brazilian waters, Papéis Avulsos de Zoologia 59, pp. 1-8 : 2

Family Syllidae Grube, 1850

Subfamily Exogoninae Langerhans, 1879 Genus Exogone Ørsted, 1845

Type species: Exogone naidina Ørsted, 1845 .

Diagnosis: Mid-sized exogonines, usually with slender, smooth bodies, papillae absent. Palps entirely fused or only with terminal notch. Prostomium with three antennae of similar size or median antenna larger than lateral ones, and two pairs of eyes. Peristomium with only one pair of peristomial cirri. Peristomial, dorsal and ventral cirri throughout relatively small, ovate; dorsal cirri occa- sionally absent from chaetiger 2. Compound chaetae as several falcigers per parapodium with distal tooth shorter than subdistal one, occasionally blades and shafts fused, or blades absent in some species; one or few chaetae per parapodium with long, spiniger-like blades, sometimes absent; dorsal and ventral simple chaetae present. Anal cirri usually slender, conspicuously longer than dorsal cirri. Pharynx with soft papillae surrounding opening and single tooth anteriorly located. Reproduction by epigamy, with ventral brooding of eggs and juveniles ( Paresque et al., 2014).