8.1" Silurian Algae With Eurypterid Telson (Tail) Plate - New York

This is an 8.1" wide, Silurian fossil algae (Buthotrephus) and unidentified eurypterid plate from the Bertie Group near Buffalo, New York. The longest section of algae is 5.8". The eurypterid telson (tail) is 1.8" long. There is a second eurypterid fossil that lacks diagnostic markers to describe its anatomical location. There are a number of other unidentified fossils in this specimen.

Buthotrephus is a marine, brown algae, similar to kelp.

Reconstruction of Eurypterus in life.  Creative Commons
Reconstruction of Eurypterus in life. Creative Commons

Eurypterids, commonly known as Sea Scorpions are an extinct group of arthropods that are related to arachnids and include the largest known arthropods to have ever lived. Prevalent during the Silurian and Devonian, eurypterids were segmented aquatic arthropods, with compound eyes, and two club-like "arms." Some species exhibit toothed claws, and may therefore have been predators.

Did you know that a Eurypterid, Eurypterus remipes is the state fossil of New York?
Buthotrephus lesquereuxi, Unidentified Eurypterid
Buffalo, New York
Bertie Group
8.1 x 6.9 x 1.3"
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