SIMPLIFIED LIST OF RECENT CLASSES AND ORDERS l8 



Class Subcl Order 

 ARACHNIDA arachnids 

 Latigastra 



Scorpionida scorpions 



Pseudoscorpionida book-scorpions, false-scorpions, 



pseudoscorpions 

 Phalangida (Opiliones) harvest-men. Daddy-long-legs 

 Acarida mites, ticks, chiggers 

 Caulogastra 



Palpigradida microscorpions 

 Thelyphonida whip-scorpions 

 Schizomida 



Phrynichida tailless-whip-scorpions 

 Araneida {Araneae) spiders, tarantulas, black-widows 

 Solpugida (Solifugae) solpugids, sun-spiders 

 Ricinuleida (Podogonata) 

 CRUSTACEA crustaceans 

 Branchiopoda 



Anostraca brine-shrimps 

 Notostraca phyllopods, fairy-shrimps 

 Conchostraca 

 Cladocera water-fleas 

 Cephalocarida 



Cephalocarida 

 Ostracoda 



Myodocopida 

 Podocopida 

 Mystacocarida 



Mystacocarida 

 Copepoda (Eucopepoda) 

 Calanoida 

 Harpacticoida 

 Cyclopoida 

 Notodelphyoida 

 Monstrilloida 

 Caligoida 

 Lernaeopodoida 

 Branchiura 



Branchiura 

 Cirripedia barnacles 

 Thoracica 

 Acrothoracica 



