File:Eurypterid (fossil sea scorpion) (probably Silurian; South Bass Island, Lake Erie, Ohio, USA) 3 (35973264076).jpg

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Eurypterid prosoma (head) with appendages from Ohio, USA. (OSU 34074, Orton Geology Museum, Ohio State University, Columbus, Ohio, USA)

The eurypterids, or sea scorpions, are an extinct group of chelicerate arthropods. They have an elongated, scorpion-like body that could reach enormous sizes (2.5 to 3 meters!), with a nonmineralizing exoskeleton composed of chitinous material. They are generally found in shallow to very shallow water marine and marginal marine facies.

This remarkable specimen is a loose piece of water-worn fossiliferous gravel from an island shoreline in Lake Erie. It has a preserved ventral surface of a eurypterid head with attached appendages.

Classification: Animalia, Arthropoda, Chelicerata, Merostomata, Xiphosura, Eurypterida

Stratigraphy: probably Silurian (if so, possibly from the Put-in-Bay Dolomite, Bass Islands Group, Pridolian Series, upper Upper Silurian)

Locality: lakeshore gravel clast from the southern shoreline of South Bass Island, western Lake Erie, far-northern Ohio, USA

See info. at:

<a href="https://en.wikipedia.org/wiki/Eurypterus" rel="nofollow">en.wikipedia.org/wiki/Eurypterus</a>
Date
Source Eurypterid (fossil sea scorpion) (probably Silurian; South Bass Island, Lake Erie, Ohio, USA) 3
Author James St. John

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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/35973264076 (archive). It was reviewed on 10 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

10 October 2019

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current00:29, 10 October 2019Thumbnail for version as of 00:29, 10 October 2019715 × 998 (669 KB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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