Ichthyostraca

Not to be confused with Ichthyostega.

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.^[2][3]

Ichthyostraca Temporal range: Late Cambrian–Present[1] PreꞒ Ꞓ O S D C P T J K Pg N
Argulus coregoni
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Clade:	Mandibulata
Clade:	Pancrustacea
Superclass:	Oligostraca
Class:	Ichthyostraca
Subclasses
Branchiura Pentastomida