Capitella Blainville, 1828

Magalhäes, Wagner F. & Hilliard, Justin, 2022, Two new deep-sea species of Capitella (Annelida: Capitellidae) from sunken wood in the Northeast Pacific, Zootaxa 5125 (2), pp. 229-240 : 230

Genus Capitella Blainville, 1828

Type species: Lumbricus capitatus Fabricius, 1780 , by monotypy. Redescribed by Blake (2009).

Diagnosis (after Blake 2009). Prostomium conical to bluntly rounded, sometimes dorsoventrally flattened, with dorsal groove present or absent, with nuchal organs as paired slits at border between prostomium and peristomium; eyes present or absent. Peristomium partly fused or distinct from prostomium. Thorax with nine segments, all chaetigerous with capillary chaetae in both rami of chaetigers 1–3, 1–4, 1–6, or 1–7, otherwise with capillaries and hooks in various combinations in both rami; chaetigers 8–9 with hooded hooks, mixed capillaries and hooks, or all capillaries, these arrangements sometimes growth dependent; prominent genital spines present in chaetigers 8–9 of males and hermaphrodites; females usually with enlarged lateral genital pores between chaetigers 7–8 or 8–9. Capillaries unilimbate with narrow wings; hooded hooks with multiple rows of denticles above main fang. Abdominal segments with hooded hooks in both rami; capillaries absent. Branchiae present or absent. Pygidium without appendages.