Capitella Blainville, 1828

Genus Capitella Blainville, 1828 View in CoL

Type species: Capitella capitata (Fabricius, 1780) = Lumbricus capitatus Fabricius, 1780 .

Diagnosis: (afer Magalhães and Blake 2020). Prostomium conical to bluntly rounded, sometimes dorsoventrally flatened, with dorsal groove present or absent, with nuchal organs as paired slits at border between prostomium and peristomium; eyespots present or absent. Peristomium forming a complete or incomplete achaetous ring. Torax 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 and 9 with hooded hooks, mixed capillaries and hooks, or all capillaries, these arrangements sometimes growth dependent; prominent genital spines present in chaetigers 8 and 9 of males and hermaphrodites; females usually with enlarged lateral genital pores between chaetigers 7 and 8 or 8 and 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.