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As conchas de amonite são um tipo comum de fóssil em formações marinhas do Mesozoico. Em estratigrafia, as amonites são consideradas excelentes fósseis de idade . As amonites viviam no meio aquático e eram carnívoras, usavam os seus tentáculos como "pés" para se deslocarem.
- Ammonoidea
- Mollusca
Ammonites are excellent index fossils, and linking the rock layer in which a particular species or genus is found to specific geologic time periods is often possible. Their fossil shells usually take the form of planispirals , although some helically spiraled and nonspiraled forms (known as heteromorphs ) have been found.
21 de mar. de 2023 · Ammonites were ocean-dwelling molluscs that died out 66 million years ago. Learn about their evolution, diversity, extinction and fossil record from the Museum's experts.
5 de ago. de 2020 · Learn about ammonites, the extinct cephalopods that ruled the prehistoric seas for millions of years and vanished in a global catastrophe. Find out how they lived, when they died, and how much we know about them today from their shells and fossils.
Ammonites were marine animals with a coiled external shell similar to that of the modern nautilus. They lived in the Jurassic and Cretaceous periods of Earth history and became extinct at the end of the Cretaceous. Learn about their features, classification, distribution, stratigraphy and more from the BGS website.
8 de jul. de 2023 · Fósseis de amonita e descobertas paleontológicas. Extinção dos Amonitas. Perguntas frequentes. Evolução e Classificação das Amonites. A evolução e classificação das amonites revelam uma fascinante história de diversificação e adaptação ao longo de milhões de anos.
8 de jul. de 2023 · Learn about the evolution, classification, fossilization, and paleontological discoveries of ammonites, extinct marine mollusks with distinctive coiled shells. Ammonites were widespread and diverse creatures that lived from the Devonian to the Cretaceous periods and went extinct along with the dinosaurs.
