Dekatriata

Dekatriata is a clade of chelicerates, it is made up of Arachnida (Spiders, scorpions, mites, and their relatives), Chasmataspidida (extinct chelicerate group), Eurypterida (Sea Scorpions), as well as genuses of Winneshiekia and Houia.

 References 

Category:Arachnids
Category:Chelicerata