Patellacea

Patellacea

[‚pad·əl′ās·ē·ə]
(paleontology)
An extinct superfamily of gastropod mollusks in the order Aspidobranchia which developed a cap-shaped shell and were specialized for clinging to rock.
References in periodicals archive ?
A new genus of Patellacea (Gastropoda) from the Middle Ordovician of Utah: the oldest known example of the superfamily.
Pleurotomariacea, Fissurellacea and Patellacea. Journal of Molluscan Studies, 1: 1-37.