Juvenile Pterygotid Sea Scorpion Acutiramus

Acutiramus macrophthalmus

Merostomata; Eurypterida; Pterygotidae

Geological Time: Upper Silurian (~ 410 million years ago)

Size: Eurypterid fossil is 46 mm long by 30 mm wide at the swimming legs; Matrix: 120 mm by 100 mm

Fossil Site: Bertie Group, Fiddler’s Green Formation, Ilion, New York, USA

Fossil Code: AW90

Price: Sold

Pterygotid Sea Scorpion AcutiramusDescription: While Eurypterids (“Sea Scorpions”) are uncommon fossils worldwide, New York state is one of the few places where conditions for preservation have been ideal. They were large arthropod predators during the Silurian and Devonian, reaching a maximum length of 2 meters. This one is a Pterygotid sea scorpion known as Acutiramus. The Pterygotids lived from the Ordovician to the Devonian, but are most common in the Silurian. They were among the larger of the Eurypterids at up to 2 meters in length. This is a quite rare juvenile specimen. While both paddles are present, the left one is really only evident when the specimen is immersed in solvent or faintly as in a negative photograph. Nevertheless this is an important example of this rare taxon.

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Pterygotid Sea Scorpion Acutiramus

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