11.8" Silurian Algae With Eurypterid Section Plate - New York

This is an 11.8" wide, Silurian fossil algae (Buthotrephus) and unidentified eurypterid plate from the Bertie Group near Buffalo, New York. The section of algae is 8.5". There are a number of eurypterid section in this specimen including, a telson (tail), several terga (abdominal sections) and unidentified sections lacking markers to determine their anatomic location. This specimen has a repaired crack.

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
11.8 x 7.9 x 1.4"
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