Museum Pterygotus bilobus Eurypterid Fossil

Pterygootus (Erettopterus) bilobus

Phylum Arthropoda, Subphylum Chelicerata, Class Merostomata, Order Eurypterida, Family Pterygotidae

Geological Time: Upper Silurian

Size (25.4 mm = 1 inch): Fossil is 125 mm long (curve measure) by 60 mm wide at the swimming legs. Matrix: 175 mm by 125 mm.

Fossil Site: Kip Burn Formation Leshmagow, Lanakshire, Scotland

Fossil Code: UKF128

Price: Sold

Pterygootus bilobus FossilDescription: While Eurypterids (“Sea Scorpions”) are uncommon fossils worldwide, New York state, Scotland, and the Kamenec-Podol’skij Mine of the Ukraine arePterygootus some 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 2.3 meters. The Eurypterids are thought to have been the first creatures to conquer land, at least on a temporary basis. It is presumed to have crawled along the seafloor, using its grasping pincers to seize trilobites and other prey. This fine example has the swimming paddles and one of the chelae(grasping appendages) preserved. The specific name refers to the bilobed telson, preserved here. Specimens such as this are no longer available, except from old collections, as the are is now protected. This one was professionally prepared in the United Kingdom. I have included a photograph of it in the as found state so you can judge for yourself the improvement quality preparation makes.

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