Scalibregma inflatum Rathke, 1843

Synonyms:
Oligobranchus roseus M. Sars,1846
S. abyssorum Hansen,1882

Distinguishing characteristics
Body anteriorly swollen and posteriorly long and slender.
Prostomium bilobed, with 2 lateral tentacles.
4 pairs of arborescent gills, starting at notopodium 2.

Species description
Body anteriorly swollen and posteriorly long and slender. The first few segments triannulate, other segments 4-annulate. Epidermis reticulate. Prostomium small and bilobed, almost rectangular with 2 lateral tentacles. Parapodia becoming bigger towards the posterior part. Noto- and neuropodia simple mounds, each with a bundle of capillary and forked chaetae. Neuropodia also with uni- or bidentate spines. Dorsal and ventral cirri present in posterior chaetigers. 4 pairs of arborescent gills, starting at notopodium 2. Pygidium with 5-7 long and short cirri.

Size
Over 25 mm for 64 segments.

Color
Purple-red with yellow blotches.

Habitat
In all kind of soft bottoms. Eulittoral to 2000 m.

Mobility
Mobile.

Feeding
Suburface deposit feeder.

Life cycle

Distribution
World-wide, North Sea to middle Baltic Sea.