Loimia Malmgren 1866

Loimia Malmgren, 1866 Type species: Loimia medusa Savigny 1822, by monotypy Diagnosis (after Hutchings et al. 2021). Transverse prostomium attached to dorsal surface of upper lip, thick crested basal part, eye spots present or absent. Peristomium restricted to lips, short button-like upper lip, and a mid-ventral lower lip. Well-developed lateral lobes on segments 1, 3, and sometimes 4. Three pairs of arborescent branchiae on segments 2–4. Notopodia from segment 4 to segment 20. Neuropodia from segment 5 to pygidium. Neurochaetae as short-handled uncini throughout, initially arranged in single rows, then in double rows in back-to-back arrangement (partially intercalated to separate double rows) from segment 11 to 20, then in single rows to pygidium. Uncini with high pectinate crest and several minute lateral teeth. Nephridial papillae on segment 3, genital papillae on segments 6–8, inserted posterior to notopodia. Pygidium smooth to papillate.