Order Hadromerida Topsent 1894

Family Polymastiidae Gray 1867

Genus Polymastia Bowerbank 1864

• Polymastia arctica (Merejkowsky 1878) – on non-organic substrates, shells, wood debris – Броцкая и др., 1963, as P. mamillaris.

Genus Radiella Schmidt 1870

• Radiella grimaldi (Topsent 1913) – on stones, shells, tubes of polychaetes.

Genus Sphaerotylus Topsent 1898

• Sphaerotylus borealis (Swarczewsky 1906) – on non-organic substrates

Genus Vosmaeria Fristedt 1885

• Vosmaeria crustacea Fristedt 1885 – on non-organic substrates

Family Suberitidae Schmidt 1870

Genus Suberites Nardo, 1833.

• Suberites carnosus (Johnston 1842) – on non-organic substrates, often on ascidians.
• Suberites ficus (Johnston 1842) – on non-organic substrates

Family Tethyidae Gray 1867

Genus Tethya Lamarck 1815.

• Tethya aurantium (Pallas 1766) – on non-organic substrates

rus:Отряд Hadromerida Topsent 1894