• Mixtoscutella ovata (Smitt, 1868)
• Oshurkovia littoralis (Hastings, 1944)
• Posterula sarsi (Smitt, 1868) accepted as Posterula sarsii (Smitt, 1868)
• Posterula sarsii (Smitt, 1868)
• Rhamphostomella argentea (Hincks, 1881) accepted as Robertsonidra argentea (Hincks, 1881)
• Rhamphostomella bilaminata (Hincks, 1877)
• Rhamphostomella costata Lorenz, 1886
• Rhamphostomella hincksi Nordgaard, 1906
• Rhamphostomella ovata (Smitt, 1868) accepted as Mixtoscutella ovata (Smitt, 1868)
• Rhamphostomella plicata (Smitt, 1868)
• Rhamphostomella radiatula (Hincks, 1877)
• Rhamphostomella scabra (O. Fabricius, 1824)
• Rhamphostomella spinigera Lorenz, 1886
• Umbonula arctica (M. Sars, 1851) accepted as Arctonula arctica (M. Sars, 1851)
• Umbonula littoralis Hastings, 1944 accepted as Oshurkovia littoralis (Hastings, 1944)
• Umbonula ovicellata Hastings, 1944
• Umbonula patens (Smitt, 1868)
• Umbonula verrucosa (Esper, 1790) accepted as Umbonula ovicellata Hastings, 1944