extinct molluskan genus found as fossils in rocks from the Jurassic period to the Eocene epoch (between 208 million and 36.6 million years ago). Related to the oysters, Gryphaea is characterized by its distinctively convoluted shape. The left valve, or shell, was much larger and more convoluted than the flattish right valve. Fine markings extended across the shell at right angles to the direction of growth. In some mature specimens, the coiling of the shell became so pronounced that it is unlikely that the shell could be opened at all, at which point the animal must have died.

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Universalium. 2010.

Look at other dictionaries:

  • Gryphaea — (fossil) Zeitraum Trias bis Jura 208 bis 135 Mio. Jahre Fundorte weltweit Systematik …   Deutsch Wikipedia

  • Gryphaea — sp. from the Cretaceous of Texas; left valve interior and exterior (same specimen). Scientific classification Kingdom …   Wikipedia

  • Gryphaea — Gry*ph[ae] a, n. [NL., fr. I gryphus, or qryps, gen. gryphis, a griffin.] (Zo[ o]l.) A genus of cretaceous fossil shells allied to the oyster. [1913 Webster] …   The Collaborative International Dictionary of English

  • Gryphaea — (Greifmuschel), s. Austern …   Meyers Großes Konversations-Lexikon

  • Gryphaea —   [zu griechisch grypós »gekrümmt«] die, , seit der obersten Trias bekannte, weltweit verbreitete Gattung überwiegend fossiler Austern, besonders entfaltet im Jura und in der Kreide, im Lias Leitfossilien (Gryphitenkalk); linke Schale hoch… …   Universal-Lexikon

  • Gryphaea —   Gryphaea Rango temporal: Jurásico Eoceno …   Wikipedia Español

  • gryphaea — gry·phaea …   English syllables

  • gryphaea — …   Useful english dictionary

  • Gryphaea arcuata — Taxobox name = Oxytoma fossil range=Early Jurassic image width = image caption = regnum = Animalia phylum = Mollusca classis = Bivalvia ordo = Pterioidea superfamilia = Ostreoidea familia=Gryphaeidae genus= Gryphaea species= G. arcuata species… …   Wikipedia

  • Грифея — (Gryphaea) пластинчатожабеный моллюск, вымершие представители которого имели значительное распространение в юрский, меловой и отчасти третичный период, напр. Gryphaea arenata служит руководящей окаменелостью для нижнего лейаса (см. Юрская… …   Энциклопедический словарь Ф.А. Брокгауза и И.А. Ефрона

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