Gryphaea, one of the genera known as devil's toenails, is a genus of extinct oysters, marine bivalve mollusks in the family Gryphaeidae. These fossils...

Gryphaea arcuata is an extinct species of foam oyster, a bivalve mollusc in the family Gryphaeidae from the Early Jurassic of Europe. It is commonly referred...

of individuals. It is closely related to the similar species Gryphaea dilobotes. Gryphaea arcuata Jurassic Coast http://piclib.nhm.ac.uk/piclib/www/image...

Montage of multiple fossils. Clockwise from top left: Onychocrinus and Palaeosinopa; bottom row: Gryphaea and Harpactocarcinus...

ISBN 978-0-393-01380-1 1980. Gould, Stephen Jay (December 1980). The Evolution of Gryphaea. New York: Arno Press. ISBN 978-0-405-12751-9. 1981. The Mismeasure of...

the Mull volcano. Near the loch shoreline, today are fossil oysters, or Gryphaea, that lived on the shoreline of a tropical sea here 200 million years ago...

†Gryphaea †Gryphaea arcuataeformis †Gryphaea arcusta – or unidentified comparable form †Gryphaea cymbium – or unidentified comparable form †Gryphaea impressimarginata...

crocodiles, ichthyosaurs, cephalopods (such as belemnites), bivalves (such as Gryphaea), and a variety of gastropods. Dinosaur eggs are stratigraphically present...

Genus †Africogryphaea Freneix, 1963 Genus †Deltoideum Rollier, 1917 Genus †Gryphaea Lamarck, 1801 Genus †Liostrea DouvillŽ, 1904 Genus †Pernostrea Munier-Chalmas...

together as one. At the top of the shield are two fossils of the species Gryphaea incurva. These remains of oysters, known as the "devil's toenails", were...