- Brachyopterus stubblefieldi (1951)
- Pterygotus anglicus (1844)
- Eurypterus remipes (1825)
Eurypterus tetragonophthalmus by Nobu Tamura
“Eurypterus is a genus of small to medium size sea scorpions from the Silurian period. Numerous species have been described and they constitute the most common eurypterids found in the fossil record.”
Eurypterids by Brian Choo
“Kalbarri, Western Australia. over 400 million years ago.
Sea-scorpions and the little Kalbarria scuttle along the shoreline looking for edible flotsam. These arthropods are among the very first animals to walk on land.
Millions of years later, their trackways will be preserved as the Tumblagooda Sandstone in Kalbarri Gorge, Western Australia. The age of the Tumblagooda trackways is poorly constrained but probably date from somewhere between the Early Ordovician and Late Silurian.”