Gigantostrea
Temporal range:
Fossil shell of Gigantostrea gigantica from Oligocene
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Ostreida
Family: Gryphaeidae
Genus: Gigantostrea
(Sacco, 1897)

Gigantostrea is an extinct genus of marine bivalve mollusks belonging to the family Gryphaeidae.[1]

This genus is known in the fossil record from the Eocene to the Miocene (age range: from 48.6 to 15.97 million years ago).[2] These fossils have been found in Europe and United States.[2][3]

Description

Shells of Gigantostrea can reach a size of about 100 millimetres (3.9 in).[4] These fossil shells are brittle, inequivalve, with the lower valve convex and the upper valve flat or slightly concave. The lower valve was cemented to the substrate.

Species

Species within this genus include:[2]

  • Gigantostrea gigantica Solander in Brander 1766
  • Gigantostrea trigonalis Conrad 1854

References


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