See text Diodora is a genus of small to medium-sized keyhole limpet in the family Fissurellidae.

[1] Like all other fissurellids, Diodora species are herbivores, and use the radula to scrape algae from rocks.

An exception is D. apertura, which grazes on sponges[2][3] such as Hymeniacidon.

[4] Water for respiration and excretion is drawn in under the edge of the shell and exits through the "keyhole" at or near the apex.

Species in this genus include:[5] Synonyms: Further species include [7]