Taxonavigation: Cyathaspidida 

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Superclassis/Classis: †Pteraspidomorphi
Subclassis: †Heterostraci
Ordo: †Cyathaspidiformes
Subordo: †Cyathaspidida

Familia: †Cyathaspididae
Subfamilia: †Cyathaspidinae
Genus: †Pionaspis

Species: †P. acuticosta – †P. amplissima – †P. planticosta

Name

†Pionaspis Denison, 1964

References

  • Denison, R.H. 1964. The Cyathaspididae. A family of Silurian and Devonian jawless vertebrates. Fieldiana 13(5): 309–473. Reference page. 
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