Cranopsis agger (Watson, 1883) Puncturella agger is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets.

[2] The shell can grow to be 6 mm in length.

[3] This species occurs in the Gulf of Mexico and off Puerto Rico at depths between 249 m and 1966 m

This Fissurellidae-related article is a stub.

You can help Wikipedia by expanding it.