https://sciencythoughts.blogspot.com/2015/11/pentecopterus-decorahensis-eurypterid.html
Sciency Thoughts: Pentecopterus decorahensis: A Eurypterid 'Sea Scorpion' from the Middle...
The Eurypterids were a curious group of Chelicerate Arthropods (the group that also includes Horseshoe Crabs, Trilobites and Arachnids). ...
sea scorpionfrom thethoughts