The shell of F. afra is ovate-oblong and convex with a moderately elevated, subcentral apex. The foramen is ovate and slightly constricted medially; the exterior showsfine radiating striae with darker violet-brown bands on a pale background, and the interior is typically whitish. Historic authors distinguished it from Diodora nimbosa by the more elevated summit and a foramen positioned further forward.
Distribution
Fissurella afra is recorded from the Cape VerdeIslands, including Santiago. Additional taxonomic and occurrence metadata are aggregated by NOAA Copepedia.
Taxonomy
The species was described by Quoy & Gaimard in 1834 during the voyage of the Astrolabe. The name Fissurella de Praya has been treated as a synonym of F. afra in modern databases.