type specimen lectotype Quaternary Holocene recent Central North Atlantic see text FEU-1001847 | identified by scientist Quaternary Holocene recent Celtic Seas Porcupine Station 23 FEU-1002664 | identified by scientist Quaternary Holocene recent Azores Challenger Station 76 FEU-1002665 | identified by scientist Quaternary Holocene recent unknown FEU-1010970 | identified by M. Hesemann Quaternary Holocene recent Greenland Sea Fram Strait FEU-1001846 | |||||