Pterygotus
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Pterygotus is an extinct genus of giant predatory eurypterid, a group of extinct aquatic arthropods. Fossils of Pterygotus have been discovered in deposits ranging in age from Middle Silurian to Late
Pterygotus anglicus
Painting painted in 1912 by Charles R. Knight depicting various eurypterids discovered in New York. The painting includes Dolichopterus, Eusarcana, Stylonurus, Eurypterus and Hughmilleria. Pterygotus can be seen in the center-left.
Illustration of fossils of P. anglicus, including three cheliceral claws.
Cheliceral claw of P. barrandei.
Eurypterid
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Eurypterids, often informally called sea scorpions, are a group of extinct marine arthropods that form the order Eurypterida. The earliest known eurypterids date to the Tremadocian stage of the Ordovi
Pterygotus
…Pterygotus is an extinct genus of giant predatory eurypterid, a group of extinct aquatic arthropods. Fossils of Pterygotus have been discovered in deposits ranging in age from Middle Silurian to Late Devonian…
Eurypterus remipes 001
Illustration of Hibbertopterus, a large stylonurine (lacking swimming paddles) eurypterid
The holotype of Palmichnium kosinkiorum, containing the largest eurypterid footprints known
The supposed "gill tracts" of eurypterids have been compared to the air-breathing pseudotracheae present in the posterior legs of modern isopods, such as Oniscus (pictured).