Gryphaeidae, common name

Common name

A common name of a taxon or organism is a name in general use within a community; it is often contrasted with the scientific name for the same organism...

 the foam oysters or honeycomb oysters, is a family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 of marine

Marine (ocean)

Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...

 bivalve mollusks, related to the true oyster

Oyster

The word oyster is used as a common name for a number of distinct groups of bivalve molluscs which live in marine or brackish habitats. The valves are highly calcified....

s.

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

Hyotissa

Hyotissa is a genus of large saltwater oysters, marine bivalve mollusks. Species in this genus are known as honeycomb oysters or "foam oysters" because under magnification, their shell structure is foam-like.-Species:...

, Neopycnodonte, and Pycnodonte

Pycnodonte

Pycnodonte is a genus of extinct oysters, marine bivalve mollusks in the family Gryphaeidae. They are found around the world in fossil shell beds from the Valanginian to Early Pleistocene...

in Pycnodonteinae have extant species.

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

• Subfamily †
  Extinction
  In biology and ecology, extinction is the end of an organism or of a group of organisms , normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point...
  
  Exogyrinae Vialov, 1936
  • Genus †Amphidonte Fischer von Waldheim, 1829
  • Genus †Costagyra Vialov, 1936
  • Genus †Exogyra
    Exogyra
    Exogyra is an extinct genus of bivalve mollusks in the family Gryphaeidae, the foam oysters or honeycomb oysters . These bivalves grew cemented by the right valve, the left or upper valve is flatter and the beak is curved to one side. Exogyra lived on solid substrates in warm seas....
    
    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
    Gryphaea
    Gryphaea, common name Devil's toenails, is a genus of extinct oysters, marine bivalve mollusks in the family Gryphaeidae.These fossils range from the Jurassic to the Cretaceous periods. They are particularly common in many parts of Britain....
    
    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
    Hyotissa
    Hyotissa is a genus of large saltwater oysters, marine bivalve mollusks. Species in this genus are known as honeycomb oysters or "foam oysters" because under magnification, their shell structure is foam-like.-Species:...
    
    Stenzel, 1971
  • Genus †Labrostrea Vialov, 1936
  • Genus Neopycnodonte Stenzel, 1971
  • Genus Pycnodonte
    Pycnodonte
    Pycnodonte is a genus of extinct oysters, marine bivalve mollusks in the family Gryphaeidae. They are found around the world in fossil shell beds from the Valanginian to Early Pleistocene...
    
    (Fischer von Waldheim, 1835)
• Subfamily Incertae sedis
  Incertae sedis
  , is a term used to define a taxonomic group where its broader relationships are unknown or undefined. Uncertainty at specific taxonomic levels is attributed by , , and similar terms.-Examples:*The fossil plant Paradinandra suecica could not be assigned to any...
  
  
  • Genus †Parahyotissa Harry, 1985
  • Genus †Rhynchostreon