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