Your current chain: State of matter Life > Kingdom Animalia > Phylum Arthropoda > Subphylum Myriapoda > Class Diplopoda > Subclass Chilognatha
(From Wikipedia) Chilognatha is a subclass of the class Diplopoda, which includes the vast majority of extant millipedes.
FACT: Ancestral millipedes were some of the first creatures to have colonized land more than 400 million years ago!
Currently discovered: 1/2 Infraclasses
Infraclass