Family Cyathaspidae Rank Genus | Phylum Chordata | |
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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