| Petraster Temporal range: | |
|---|---|
| Petraster sp. | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Asteroidea |
| Genus: | †Petraster Billings, 1858 |
| Species | |
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| Synonyms | |
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Petraster is a genus of extinct starfish that lived from the upper Ordovician to the late Silurian. The genus has a large distribution range, fossils have been found in North America, and Australia.
