Discina Sous-embranchement (subphylum) des Linguliformea Classe des Lingulata Ordre des Lingulida Super-famille des Discinoidea Famille des Discinidae

Genus Discina Lamarck, 1819

[D. ostreoides; OD; =Crania striata Schumacher, 1817, p. 102] Type species = Discina striata (Schumacher)

Shell irregularly subcircular, biconvex to convexoconcave; ventral valve cemented to substrate, pedicle opening may be sealed in adults; both valves with subcentral apex; ornament of concentric growth lines and fine costellae; ventral interior with high, subtriangular median septum (probably attachment site of oblique internal muscle) extending short distance posteriorly of apex, partially closing pedicle opening, and almost forming pedicle tube; lophophore spirolophous.

Holocene - Present Diagnosis from volume 2 of the Treatise on Invertebrate Paleontology

Extant Species of Discina

D. striata (Schumacher, 1817)

FIGURES : Discina      Geographic distribution