Kingdom Animalia Family Cyathaspidae Rank Genus Subclass Heterostraci | Suborder Cyathaspidida Phylum Chordata Order Cyathaspidiformes | |
 | ||
Similar Heterostraci, Anglaspis, Ctenaspis, Traquairaspis, Pteraspididae | ||
Poraspis is an extinct genus of heterostracan. Fossils are found in Late Silurian and Early Devonian marine strata of Norway, Canada and the United States.
References
Poraspis Wikipedia(Text) CC BY-SA