Gryphaeidae

Gryphaeidae Temporal range: Middle Triassic to Recent PreЄ Є O S D C P T J K Pg N
Exogyra flabellata (Owl Creek Formation, Late Cretaceous, Ripley, Mississippi)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Ostreoida
Family:	Gryphaeidae Vyalov, 1936
Genera
See text.

Gryphaeidae, common name the foam oysters or honeycomb oysters, is a family of marine bivalve mollusks, related to the true oysters.

Taxonomy

Genera and species within this family are divided into three subfamilies, Exogyrinae, Gryphaeinae and Pycnodonteinae. Both Exogyrinae and Gryphaeinae are completely extinct and only three genera Hyotissa, Neopycnodonte, and Pycnodonte in Pycnodonteinae have extant species.

Family Gryphaeidae Vialov, 1936 (some genera also known as Devil's toenails)

• Subfamily †Exogyrinae Vialov, 1936
  • Genus †Amphidonte Fischer von Waldheim, 1829
  • Genus †Costagyra Vialov, 1936
  • Genus †Exogyra Say, 1820
  • Genus †Fluctogyra Vialov, 1936
  • Genus †Gryphaeostrea Conrad, 1865
  • Genus †Gyrostrea Mirkamalov, 1963
  • Genus †Nanogyra Beurlen, 1958
  • Genus †Nutogyra Vialov, 1936
  • Genus †Planospirites Lamarck, 1801
  • Genus †Vultogryphaea Vialov, 1936
• Subfamily †Gryphaeinae Vialov, 1936
  • Genus †Africogryphaea Freneix, 1963
  • Genus †Deltoideum Rollier, 1917
  • Genus †Gryphaea Lamarck, 1801
  • Genus †Liostrea DouvillŽ, 1904
  • Genus †Pernostrea Munier-Chalmas, 1864
  • Genus †Praeexogyra Charles, 1952
• Subfamily Pycnodonteinae Stenzel, 1959
  • Genus †Gigantostrea (Sacco, 1897)
  • Genus Hyotissa Stenzel, 1971
  • Genus †Labrostrea Vialov, 1936
  • Genus Neopycnodonte Stenzel, 1971
  • Genus Pycnodonte (Fischer von Waldheim, 1835)
• Subfamily Incertae sedis
  • Genus †Parahyotissa Harry, 1985
  • Genus †Rhynchostreon