Entognatha

The Entognatha is a class of ametabolous arthropods, which, together with insects, makes up the superclass Hexapoda. Their mouthparts are entognathous, meaning they are retracted within the head. The class contains three orders: Collembola (springtails), Diplura and Protura.

Entognatha
Proturan specimen (Acerentomon sp.)
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Hexapoda
Class:	Entognatha
Orders
Collembola Diplura Protura