Query: North American arthropods from the Devonian period or the Silurian period
Domain: animals
Relevant documents:
Trigonotarbida
Carcinosoma
Hardieopterus
Stoermeropterus
Clarkeipterus
Hallipterus
Erieopterus
Xyloiuloidea
Uraraneida
Kokomopterus
Eusarcana
Grossopterus
Bassipterus
Thylacares
Ruedemannipterus
Microdecemplex
Angustidontus