NARMS Taxon list
Halicometes elongata Boury-Esnault, Pansini & Uriz, 1994
Tethea spinosa Bowerbank, 1874 accepted as Tethyspira spinosa (Bowerbank, 1874)
Tethea spinularia Bowerbank, 1866 accepted as Spinularia spinularia (Bowerbank, 1866)
Tethya aurantium (Pallas, 1766)
Tethya citrina Sarà & Melone, 1965
Tethya cranium (Müller, 1776) accepted as Craniella cranium (Müller, 1776)
Tethya cranium var. abyssorum Carter, 1876 accepted as Craniella abyssorum (Carter, 1876)
Tethya cranium var. infrequens Carter, 1876 accepted as Craniella cranium (Müller, 1776)
Tethya gracilis Sarà, Sarà, Nickel & Brümmer, 2001
Tethya hibernica Heim, Nickel, Picton & Brümmer, 2007
Tethya irregularis Sarà & Bavestrello, 1998
Tethya lyncurium (Linnaeus, 1767) accepted as Tethya aurantium (Pallas, 1766)
Tethya minuta Sarà, Sarà, Nickel & Brümmer, 2001
Tethya norvegica (Bowerbank, 1872)
Tethya sibirica Fristedt, 1887 accepted as Tetilla sibirica (Fristedt, 1887)
Tethya wilhelma Sarà, Sarà, Nickel & Brümmer, 2001
Tethya zetlandica Carter, 1872 accepted as Craniella zetlandica (Carter, 1872)