Agnatha
Species

Phialaspis symondsi (Lankester, 1866)

Classification
Organism groupBiota
KingdomAnimalia
PhylumChordata
SubphylumVertebrata
SuperclassAgnatha
ClassPteraspidomorphi
SubclassHeterostraci
OrderPhialaspidiformes
FamilyPhialaspididae
GenusPhialaspis
Speciessymondsi