Hyotissa

Hyotissa is a genus of large saltwater oysters, marine bivalve mollusks in the family Gryphaeidae.^[1]

Hyotissa
Three shells of Hyotissa hyotis
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Ostreida
Family:	Gryphaeidae
Genus:	Hyotissa Stenzel, 1971
Type species
Mytilus hyotis Linnaeus, 1758
Synonyms
Parahyotissa Harry, 1985 Parahyotissa (Numismoida) Harry, 1985 Parahyotissa (Parahyotissa) Harry, 1985 Parahyotissa (Pliohyotissa) Harry, 1985

Species in this genus are known as honeycomb oysters, or "foam oysters" because under magnification, their shell structure is foam-like.

Species

• Hyotissa haitensis (Sowerby, 1850)
• Hyotissa hyotis (Linnaeus, 1758) - Giant honeycomb oyster
• Hyotissa inermis (G. B. Sowerby II, 1871)
• Hyotissa mcgintyi (Harry, 1985)
• Hyotissa numisma (Lamarck, 1819)
• Hyotissa quercina (G. B. Sowerby II, 1871)
• Hyotissa sinensis (Gmelin, 1791)
• Hyotissa semiplana (de Sowerby 1825)

Species brought into synonymy

• Hyotissa chemnitzii (Hanley, 1846): synonym of Dendostrea rosacea (Deshayes, 1836)
• Hyotissa quercina (G. B. Sowerby II, 1871): synonym of Hyotissa quercinus (G. B. Sowerby II, 1871) (incorrect spelling of specific epithet (quercinus is a noun in apposition))
• Hyotissa thomasi (McLean, 1941): synonym of Hyotissa mcgintyi (Harry, 1985)