Parexogone Mesnil & Caullery, 1918

Barroso, Rômulo, Paiva, Paulo Cesar De, Nogueira, João Miguel De Matos & Fukuda, Marcelo Veronesi, 2017, Deep sea Syllidae (Annelida, Phyllodocida) from Southwestern Atlantic, Zootaxa 4221 (4), pp. 401-430 : 406

Genus Parexogone Mesnil & Caullery, 1918

Type species. Paedophylax hebes Webster & Benedict, 1884 .

Diagnosis. Body short, slender, palps totally fused or with only distal notch. Prostomium with 2 pair of eyes, sometimes also 1 pair of anterior eyespots; 3 antennae, frequently inserted away from each other. Peristomium with 1 pair of peristomial cirri. Dorsal cirri short, papilliform or ovate; ventral cirri smaller than dorsal ones. Falcigers with little variation along body, unidentate or bidentate, the latter with distal tooth larger than subdistal one. Some species with dorsalmost falcigers with remarkably longer blades, similar to spiniger-like chaetae. Dorsal simple chaetae with similar morphology throughout body, unidentate or bidentate. Reproduction by epigamy, with ventral incubation of eggs and embryos; some species viviparous.

Remarks. See remarks of Exogone .