#asteroceras

[toothwalker]

working on reference sheets for art fight! here are some bits from Wynstan's sheet that I got overexcited about and rendered too nicely

[transparentfossil]

2.8" Jurassic Ammonite (Asteroceras) Fossil - Dorset, England

[earthstory]

fms.fossils

One of my very favourite ammonite fossils I have found at Lyme Regis is this large Asteroceras stellare that split open perfectly from its concretion to reveal both the positive and negative parts of the shell. The ammonites found in these particular rocks are usually very crushed and don't look good, but this one is near perfect. Around 196 million years old and related to living squid and octopuses.

[gltzgghln]

aram vill azhdarchid/ammonite lad who’s doing his best fascinated by wristwatches and corporate corruption grandma was a balearic islands cave goat in a rain coat. convenient

[252mya]

Asteroceras stellare

Artwork by Franz Anthony / @franzanth

This ammonite was a fast swimmer that lived in the Early Jurassic oceans around 190-205 million years ago. Its name means the “true star” ammonite, given by the English naturalist James Sowerby in 1815.

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252MYA creates custom-made artwork for private collections and editorial, scientific, or educational project.

[ariganahl]

25- Asteroceras

I think this is the genus of ammonite that people are most familiar with. They were around largely in the early Jurassic time period

[uk-fossils]

Interpreting ammonite fossils

Ammonites are such popular and well-known fossils that suggesting they need interpreting may seem ridiculous. But for all their familiarity, there is still a good deal of debate over how they lived and what they did. If nothing else, ammonite experts all agree that they were ecologically diverse, with different species doing different things, and broadly speaking, they can be divided into…

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[palaeopedia]

The Asteroceras

Phylum : Mollusca Class : Cephalopoda Subclass : Ammonoidea Family : Arietitidae Genus : Asteroceras Species : A. confusum, A. obtusum, A. smithii, A. stellare, A. tumeri

Early Jurassic (203 - 189 Ma)

8 cm long (size)

England (map)

Asteroceras is an extinct genus of cephalopod belonging to the Ammonite subclass. Asteroceras fossils may be found at Lyme Regis in the Asteroceras obtusum zone of Upper Sinemurian age.