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Gulielmites jason Ammonite 1.jpg

Gulielmites jason Ammonite

Kellaways Sandstone, England
Jurassic Period (201.3-145 million years ago)
Kosmoceratidae is an extinct ammonite family from the Callovian (Middle Jurassic) to Early Cretaceous. Kosmoceratidae are probably the most polymorphic groups of Jurassic ammonites. These ammonoids have a more or less tabulate venter, with lateral or ventrolateral tubercles. The aptychus is double valved with a concentrically ribbed surface. Ecology: fast-moving nektonic carnivore.
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda Subclass: †Ammonoidea
Order: †Ammonitida
Family: †Kosmoceratidae
Genus: †Gulielmites
Species: †jason

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