''Pelagodiscus'' is a monospecific genus of discinid

brachiopod Brachiopods (), phylum (biology), phylum Brachiopoda, are a phylum of animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear e ...

s. Silica tablets leave a distinctive tesselating imprint on the inner surface of its shell.

References

Monotypic brachiopod genera Discinida {{brachiopod-stub