Your current chain: State of matter Life > Kingdom Animalia > Phylum Arthropoda > Subphylum Chelicerata > Class Arachnida > Order Scorpiones > Suborder Neoscorpionina > Infraorder Orthosterni
(From Wikipedia) Orthosterni is an infraorder within the order Scorpions.
FACT: The evolutionary history of scorpions goes all the way back to the Silurian period, 435 million years ago!
Currently discovered: 1/2 Parvorders
Parvorder