Ehrenberg, 1839 Soritidae Holocene recent Arabian Sea Socotra Dr. Gregor identified by M. Hesemann 1 / FEU-1000110 | (Reichel, 1937) Alveolinidae Holocene recent Arabian Sea Socotra Dr. Gregor identified by M. Hesemann 2 / FEU-1000241 | (Dawson, 1860) Nonionidae Holocene recent off Spitsbergen Spitsbergen Dr. Gregor identified by M. Hesemann 3 / FEU-1005716 | (Dawson, 1860) Nonionidae Holocene recent off Spitsbergen Spitsbergen Dr. Gregor identified by M. Hesemann 4 / FEU-1005717 |