Psammosteidae

Psammosteidae is an extinct family of flattened, benthic heterostracan vertebrates that lived in marine and estuary environments in Europe, Russia & North America. They arose during the Early Devonian, with the first (and best) known genus, Drepanaspis from the Hunsrück lagerstätte. The Psammosteids were the only heterostracans that survived the Upper Frasnian extinction event during the Late Devonian, dying out in the extinction event at the very end of the Devonian.

Psammosteidae Temporal range: 416–359 Ma PreꞒ Ꞓ O S D C P T J K Pg N Early to Late Devonian
Drepanaspis gemuendina and Tiaraspis subtilis
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Subphylum:	Vertebrata
Infraphylum:	Agnatha
Class:	†Pteraspidomorpha
Subclass:	†Heterostraci
Order:	†Pteraspidiformes
Suborder:	†Psammosteida
Family:	†Psammosteidae
Genera
Drepanaspis Psammosteus Pycnosteus Schizosteus Tartuosteus

References

• Palaeos Vertebrates