Diodora sayi

{{Short description|Species of gastropod}} {{Use dmy dates|date=August 2020}} {{Speciesbox | image = Diodora sayi 001.jpg | image_caption = Shell of ''Diodora sayi'' (specimen at the Natural History Museum Rotterdam) | genus = Diodora | species = sayi | authority = (Dall, 1889) | synonyms_ref = | synonyms = * ''Fissurella (Cremides) alternata var. sayi'' Dall, 1889 superseded combination * ''Fissurella sayi'' Dall, 1889 superseded combination * F''issuridea sayi'' (Dall, 1889) superseded combination * ''Glyphis sayi'' (Dall, 1889) superseded combination }}

'''''Diodora sayi''''' is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets.<ref name="WoRMS">{{WRMS species|419347|''Diodora sayi'' (Dall, 1889)}}</ref>

==Description== (Original description) The deep-water specimens of ''Fissurella (Cremides) alternata var. sayi'' (synonym of ''Diodora cayenensis'' (Lamarck, 1822) ) are generally smaller, of an olivaceous cast, and with the color rays very faint or entirely absent.<ref>{{cite journal |last1=Dall |first1=W.H. |title=Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877-78) and in the Caribbean Sea (1879-80), by the U.S. Coast Survey Steamer "Blake", Lieut.-Commander C.D. Sigsbee, U.S.N., and Commander J.R. Bartlett, U.S.N., commanding. XXIX. Report on the Mollusca. Part 2, Gastropoda and Scaphopoda |journal=Bulletin of the Museum of Comparative Zoölogy at Harvard College. |date=1889 |volume=18 |page=407 |url=https://www.biodiversitylibrary.org/item/25505 |access-date=14 October 2025}} {{source-attribution}}</ref>

==Distribution== This species occurs in the Atlantic Ocean off Brazil and the Cape Verde.

==References== {{Reflist}} * Rosenberg, G.; Moretzsohn, F.; García, E. F. (2009). Gastropoda (Mollusca) of the Gulf of Mexico, Pp. 579–699 in: Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Texas A&M Press, College Station, Texas. * Turgeon, D., Quinn, J. F., Bogan, A. E., Coan, E. V., Hochberg, F. G., Lyons, W. G., Mikkelsen, P. M., Neves, R. J., Roper, C. F. E., Rosenberg, G., Roth, B., Scheltema, A., Thompson, F. G., Vecchione, M., Williams, J. D. (1998). Common and scientific names of aquatic invertebrates from the United States and Canada: mollusks. 2nd ed. American Fisheries Society Special Publication, 26. American Fisheries Society: Bethesda, MD (USA). ISBN 1-888569-01-8. IX, 526 + cd-rom pp

Category:Diodora Category:Gastropods described in 1889 Category:Taxa named by William Healey Dall