Species of Anatoma (Gastropoda: Anatomidae) in Norwegian and adjacent waters, with the description of two new species

The species of Anatoma Woodward, 1859 from Norwegian waters and from the Norwegian Sea are treated taxonomically. Anatoma crispata (Fleming, 1828) has until quite recently been regarded as the sole representative of this family in north European waters, but constant conchological differences make it evident that at least three species have been lumped under this name in Norwegian and other Scandinavian literature. Three species, A. crispata, A. aspera (Philippi, 1844) and A. tenuisculpta (Seguenza, 1877) are redescribed and two new species from deep water in the Norwegian Sea, A. schioettei new species and A. schanderi new species, are described based on shell characters. The distribution in inshore Norwegian waters and in the Norwegian Sea is described, and possible microhabitats suggested. Also geographical variability of conchological characters is discussed in some detail.