Pterygotus

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Summary
pronunciation:Terry-goat-us

Pterygotus was the largest Arthropod of all, time, being closely followed by the giant millipede Arthropleura.

Characteristics and Appearance
Pterygotus was a Giant sea scorpion as long as a car. Although it belonged to the group eurypterid (sea scorpion), it had a more Lobster-like appearance. During the time which it lived (Silurian-Devonian) it probably fed on the likes of Brontoscorpio and Cephalaspis. Fossils have been found in seas worldwide except for the Antarctic. It wa closely related to the Arthropod Slimonia.