''Althaspis'' is an extinct genus of pteraspidid heterostracan

agnathan Agnatha (; ) or jawless fish is a paraphyletic infraphylum of animals in the subphylum Vertebrata of the phylum Chordata, characterized by the lack of jaws. The group consists of both living ( cyclostomes such as hagfishes and lampreys) and ext ...

. Fossils are found in Early

Devonian The Devonian ( ) is a period (geology), geologic period and system (stratigraphy), system of the Paleozoic era (geology), era during the Phanerozoic eon (geology), eon, spanning 60.3 million years from the end of the preceding Silurian per ...

-aged marine strata of

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

References

Pteraspidiformes genera Devonian jawless fish Devonian animals of Europe {{Pteraspidomorphi-stub