Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795 Nudipleura Wägele & Willan, 2000 Pleurobranchoidea Gray, 1827 Family Pleurobranchidae Gray, 1827 Genus Berthella Blainville, 1824 1 Berthella plumula (Montagu, 1803) 2 Berthella stellata (Risso, 1826)