Ichthyostraca
| Ichthyostraca Temporal range:  | |
|---|---|
| Argulus coregoni | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Arthropoda | 
| Clade: | Mandibulata | 
| Clade: | Pancrustacea | 
| Superclass: | Oligostraca | 
| Class: | Ichthyostraca | 
| Subclasses | |
Ichthyostraca is a class of parasitic crustaceans. It is composed of two subclasses; Pentastomida and Branchiura. They mainly parasitize various vertebrates and feed on their blood or mucus.