19 Arthropoda 



Class Subcl Order 



Ascothoracica 



Apoda 



Rhizocephala 

 Malacostraca 



Nebaliacea 



Anaspidacea 



Mysidacea opossum-shrimps 



Thermosbaenacea 



Spelaeogriphacea 



Lophogastridea 



Cumacea 



Tanaidacea 



Isopoda pillbugs, sowbugs 



Amphipoda scuds 



Euphausiacea krill 



Decapoda crabs, lobsters, crayfish, shrimps, prawns 



Stomatopoda mantis-shrimps 

 PAUROPODA 



Heterognatha 

 SYMPHYLA 



Cephalostigmata 

 DIPLOPODA millipedes 

 Pselaphognatha 



Ancyrotricha 



Lophotricha 

 Chilognatha 



Limacomorpha 



Oniscomorpha 



Ascospermophora 



Colobognatha 



Nematophora 



Proterospermophora 



Opisthospermophora 

 CHILOPODA centipedes 

 Pleurostigmophora 



Geophilomorpha 



Scolopendromorpha 



Lithobiomorpha 



Craterostigma 

 Notostigmophora 



Scutigeromorpha 



