Pteraspidomorphi

Taxobox
name = "Pteraspidomorphi"

---

image_caption = "Drepanaspis gemuendina", accompanied by "Tiaraspis subtilis"
fossil_range = Ordovician - Devonian
|regnum = Animalia
phylum = Chordata
classis = Agnatha
subclassis = 'Pteraspidomorphi'
subdivision_ranks = Orders
subdivision = "Arandaspida" "Heterostraci" "Thelodontidae" "Eriptychiida" "Astraspida"

Pteraspidomorphi is an extinct subclass of early jawless fish. The fossils show extensive shielding of the head. Some species may have lived in fresh water.The taxon contains the subgroups Heterostraci, Astraspida, Arandaspida and Eriptychiida.

External links

* [http://tolweb.org/tree?group=Pteraspidomorphi&contgroup=Vertebrate tolweb.org]