original description(ofNatica obtusa Jeffreys, 1885)Jeffreys, J. G. (1885). On the Mollusca procured during the 'Lightning' and 'Porcupine' expeditions, 1868-70 (Part IX). Proceedings of the Zoological Society of London. 1885 : 27-63, pl. 4-6., available online athttp://www.biodiversitylibrary.org/page/31015014 page(s): 33-34; pl. 4 fig. 6-6a [details]
context source (Deepsea)Sysoev A.V. (2014). Deep-sea fauna of European seas: An annotated species check-list of benthic invertebrates living deeper than 2000 m in the seas bordering Europe. Gastropoda. Invertebrate Zoology. Vol.11. No.1: 134–155 [in English].[details] Available for editors
basis of recordRolán E. (2005). Malacological Fauna From The Cape Verde Archipelago. Part 1, Polyplacophora and Gastropoda. ConchBooks. Hackenheim. ISBN 3-325319-73-2. 455 pp. (look up in RoR) [details]