''Hibernaspis'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of extinct amphiaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of

Siberia Siberia ( ; rus, Сибирь, r=Sibir', p=sʲɪˈbʲirʲ, a=Ru-Сибирь.ogg) is an extensive geographical region, constituting all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has been a part of ...

near the Taimyr Peninsula. In life, species of ''Hibernaspis'' were thought to be benthic animals that lived most of their lives mostly buried in the sediment of a series of hypersaline lagoons. All amphiaspids are easily distinguished from other heterostracans in that all of the plates of the cephalothorax armor are fused into a single, muff-like unit, so that, in the case of ''Hibernaspis'', the forebody of the living animal would have looked like a large guitar pic with serrated edges, with a pair of tiny, degenerated eyes, a pair of branchial openings for exhaling, and a simple, slit-like mouth at the anterior end. There are two species of ''Hibernaspis'', ''H. macrolepis'', the type species, and ''H. tenuicristata''. Each species differs from each other through shapes of the serrated edges, and micrornamentation of the cephalothoracic armor.

References

Amphiaspidida Devonian jawless fish Early Devonian fish Cyathaspidiformes genera Fauna of Siberia Fossils of Russia Early Devonian first appearances Devonian extinctions {{Devonian-jawless-fish-stub