original description(ofRanella thomae A. d'Orbigny, 1853)Orbigny, A. d'. (1841-1853). Mollusques. In: R. de la Sagra (ed.). Histoire physique, politique et naturelle de l'Ile de Cuba. Arthus Bertrand, Paris. Vol 1: 1-264 [pp. 1-208, pls 1-8, 4bis [1841]; 209-264 [1842]; Vol. 2: 1-380 [pp. 1-112, pls 9-19 [1842]; 113-380, pls 20-28 [1853]. , available online athttp://www.biodiversitylibrary.org/item/138987 page(s): 2: 164, pl. 23 fig. 23 [details]
context source (Bermuda)Jensen, R. H. (1997). A Checklist and Bibliography of the Marine Molluscs of Bermuda. Unp. , 547 pp[details]
basis of recordGofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca. in: Costello, M.J. et al. (eds), European Register of Marine Species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Patrimoines Naturels. 50: 180-213., available online athttp://www.vliz.be/imisdocs/publications/ocrd/254404.pdf[details]
additional sourceRol�n 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 IMIS) [details]