Platycrinites
Platycrinites are an extinct genus of Paleozoic stalked crinoids belonging to the family Platycrinitidae.[2]
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| Fossil specimens of Platycrinites hemisphaericus from United States, on display at Galerie de paléontologie et d'anatomie comparée in Paris | |
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| Subclass: | Camerata |
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| Genus: | Platycrinites Miller 1821 |
These stationary upper-level epifaunal suspension feeders lived during the Devonian, Permian and the Carboniferous periods, from 376.1 to 259.0 Ma.[1]
Species
- Platycrinites crokeri Campbell and Bein 1971
- Platycrinites ellesmerense Broadhead and Strimple 1977
- Platycrinites halos Webster and Jell 1999
- Platycrinites hemisphaericus (Meek & Worthen)
- Platycrinites nikondaense Broadhead and Strimple 1977
- Platycrinites omanensis Webster and Sevastopulo 2007
- Platycrinites testudo Campbell and Bein 1971
- Platycrinites wachsmuthi Wanner 1916
- Platycrinites wrighti Marez-Oyens 1940
Description
These moderate sized extinct crinoids had a columnar stem with a twisted pattern.[3] On top of the stem was a calyx with a number of feather-like arms.
Distribution
Fossils of this genus have been found in the Devonian of Germany, in the Carboniferous of Australia, Canada, China, Ireland, United Kingdom, United States. As well as in the Permian of Australia, Canada, Indonesia, Oman and United States.[1]
gollark: > As long as our hypothetical Blub programmer is looking down the power continuum, he knows he's looking down. Languages less powerful than Blub are obviously less powerful, because they're missing some feature he's used to. But when our hypothetical Blub programmer looks in the other direction, up the power continuum, he doesn't realize he's looking up. What he sees are merely weird languages. He probably considers them about equivalent in power to Blub, but with all this other hairy stuff thrown in as well. Blub is good enough for him, because he thinks in Blub.
gollark: Imagine YOU are a BLUB programmer.
gollark: Imagine a language which is UTTERLY generic in expressiveness and whatever, called blub.
gollark: There's the whole "blub paradox" thing.
gollark: Assembly FAIRLY unbased.
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