Buffalopterus

Buffalopterus is a prehistoric eurypterid from the Silurian-aged Bertie Formation of New York and Ontario. The genus contains one species, "B. pustulosus". It is closely related to "Strobilopterus", but differs primarily by having a bizarre, globular telson (which is otherwise sword-like or spine-like in other eurypterids), and in size, being estimated to be at least 1 meter in length.