''Poraspis'' is an
extinct
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...
genus of
heterostracan.
Fossils are found in Late Silurian and Early Devonian marine strata of
Norway,
Canada and the
United States.
References
Cyathaspidida
Silurian first appearances
Devonian extinctions
Fossil taxa described in 1930
Paleozoic jawless fish
Paleozoic fish of North America
Cyathaspidiformes genera
{{Devonian-jawless-fish-stub