''Aserotaspis'' is an extinct genus of

jawless fish Agnatha (, Ancient Greek 'without jaws') is an infraphylum of jawless fish in the phylum Chordata, subphylum Vertebrata, consisting of both present (cyclostomes) and extinct (conodonts and ostracoderms) species. Among recent animals, cyclostomes ...

which existed in what is now northern

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

."A New Agnathan from the Lower Devonian of Arctic Canada, and a review of the Tessellated Heterostracans"
by D.K. Elliott and E.J. Loeffler, 1988. It was first named by Dineley and Loeffler in 1976, and contains the species ''Aserotaspis canadensis''.

References

Heterostraci genera Fossils of Canada {{Devonian-jawless-fish-stub