Diodora sayi

Diodora sayi
Shell of Diodora sayi (specimen at the Natural History Museum Rotterdam)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Lepetellida
Family:	Fissurellidae
Genus:	Diodora
Species:	D. sayi
Binomial name
Diodora sayi (Dall, 1889)
Synonyms
Fissurella (Cremides) alternata var. sayiDall, 1889 superseded combination Fissurella sayiDall, 1889 superseded combination Fissuridea sayi(Dall, 1889) superseded combination Glyphis sayi(Dall, 1889) superseded combination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. ^[1]

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. ^[2]

Distribution

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

References

1. Diodora sayi (Dall, 1889) . Retrieved through: World Register of Marine Species .
2. Dall, W.H. (1889). "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". Bulletin of the Museum of Comparative Zoölogy at Harvard College. 18: 407. Retrieved 14 October 2025. This article incorporates text from this source, which is in the public domain .

• 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