original description(ofSpirotropis megalacme Sykes, 1906)Sykes E. R. 1906. On the Mollusca procured during the "Porcupine" Expeditions 1869-1870. Supplemental notes, part III. <i>Proceedings of the Malacological Society of London</i> 7: 173-190, pl. 16, available online athttp://biodiversitylibrary.org/page/15797635 page(s): 183, pl. 16 fig. 5 [details]
context source (MSBIAS)MEDIN. (2011). UK checklist of marine species derived from the applications Marine Recorder and UNICORN. version 1.0.[details]