Scalibregma celticum new species is described from Europe and compared to
S. inflatum Rathke, 1843, the type species of the genus. The new species differs from
S. inflatum in the possession of eyes, form of the peristomium, structure of the mouth and tessellate pattern of the anterior dorsum. As both species possess short spines in the parapodia of some anterior setigers, the status of the genus
Sclerobregma Hartman, 1965 is re-examined.
Sclerobregma is retained for the type species,
S. branchiatum Hartman, 1965, but
S. stenocerum Bertelsen and Weston, 1980 is newly transferred to
Scalibregma.