- Bristletail (order Thysanura) they are the first Insecta.
- Earliest spiders: The Uraraneida Attercopus fimbriungis, a type of protospider. The first Mesothelae (a primitive true spider) appears in the Upper Pennsylvanian around 305 MYA.
390 MYA (Mortal)
390 MYA