During which period did eurypterids swim the oceans and the first jawed fish and vascular plants evolve?

1 Answer
Oct 14, 2017

The Silurian Period

Explanation:

The Silurian period lasts from about 440 to 410 mya.
Eurypterids resembled giant water scorpions, usually measuring 5 to 17 inches, but the biggest (Pterygotus) reached 6 to 8 feet in length.

A relatively short period in geological history.
A time of stabilization of global temperatures.
The Silurian period is the first period in history where fish begin to appear in the fossil record.
A time of the first terrestrial animals.
http://go2add.com/paleo/eurypterids.php