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Description: | Specimen of a fossil ammonite, Dactylioceras commune, collected from Upper Lias rocks of Commune Sub-zone, Early Jurassic age.
Dactylioceras commune is an ammonite that is commonly found on the Yorkshire coast. This is the same kind of ammonite as the snakestone, also in this case, so that you can see what it would have looked like before the snake's head was carved on it. The ribs of Dactylioceras start as a single line and then split into pairs over the edge (keel) of the ammonite, and then turn back to a single line. This is called 'bifurcation'. These rib patterns are often used to tell different species of ammonites apart.
It is from the Jurassic period (206 - 144 million years ago) | Publisher: | Tyne & Wear Archives & Museums | Subjects: | Cephalopoda Classification: Animalia Invertebrata Ammonoidea Mollusca | Temporal: | Jurassic period (206 - 144 million years ago) | Source: | Tyne & Wear Archives & Museums | Identifier: | http://www.twmuseums.org.uk/geofinder/se... | Go to resource |
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Ammonite
Dactylioceras commune is an ammonite…
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