Naineris quadricuspida (Fabricius, 1780)

Synonyms:
Nais quadricuspida Fabricius, 1780
Scoloplos minor Oersted, 1843
Scoloplos quadricuspida Oersted, 1843
Nainereis quadricuspida McIntosh, 1910
Naineris quadricuspida Hartmann-Schröder, 1971

Distinguishing characteristics
Prostomium broadly rounded.
Thoracic chaetae capillaries and a few forked chaetae.

Species description
Body anteriorly slightly flattened, posteriorly pointed. Prostomium broadly rounded. Thorax with 11-17 chaetigers. Thoracic notopodia with a single postchaetal lobe, a bundle of capillary chaetae and a few forked chaetae. Thoracic neuropodia with a postchaetal lobe with a single triangular projection. Abdominal notopodia as thoracic notopodia. Abdominal neuropodia bilobed, with few chaetae and few protruding aciculae. Branchiae start at chaetiger 4-6. Pygidium with 4 lobes and 4 short cirri.

Size
Up to 80 mm for 130 segments.

Color
Yellowish, pale pink or flesh-coloured, with red gills.

Habitat
Generally in low water between seaweeds and rocks. Also on soft bottoms between shells and stones.

Mobility

Feeding

Life cycle

Distribution
Arctic, North Pacific, North Atlantic to the northern North Sea and Skagerrak.