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Cardioceras
''Cardioceras'' is an extinct ammonite genus belonging to the family Cardioceratidae. These fast-moving nektonic carnivores lived during the Jurassic period, Oxfordian age. Description Shells of ''Cardioceras'' species can reach a diameter of . The shape is circular, with ribs and a prominent ridge along the dorsal edge. Distribution Fossils of species within this genus have been found in the Jurassic The Jurassic ( ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of ... of France, Germany, Poland, Russia, the United Kingdom and Alaska. References Jurassic ammonites Ammonites of Europe Ammonitida genera Stephanoceratoidea {{ammonitina-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cardioceratidae
Cardioceratidae is an extinct ammonite family belonging to the superfamily Stephanoceratoidea. These fast-moving nektonic carnivores lived during the Middle-Late Jurassic The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 163.5 ± 1.0 to 145.0 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic strata.Owen 1987. In European lithostratigraphy, the name ... periods. References External links Jurassic ammonites Late Jurassic first appearances Late Jurassic extinctions Ammonitida families Stephanoceratoidea {{ammonitina-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |