# Arctacanthus

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{{Short description|Extinct genus of fish}}
{{Automatic taxobox
| taxon = Arctacanthus
| fossil_range = {{fossil range|Wuchiapingian|latest = Anisian}}
| authority = [Nielsen](/source/Eigil_Nielsen_(paleontologist)), 1932
| type_species = {{extinct}}''Arctacanthus uncinatus''
| type_species_authority = Nielsen, 1932
| synonyms = ''Dolophonodus''  <small>Branson, 1932</small><ref name=Branson1934/>
| subdivision = 
*{{extinct}}''A. exiguus'' <small>Yamagishi, 2004</small>
*{{extinct}}''A. wyomingensis'' <small>Branson, 1934</small>
}}
'''''Arctacanthus''''' is an [extinct](/source/extinct) [genus](/source/genus) of [cartilaginous fish](/source/cartilaginous_fish) from the [Permian](/source/Permian) and possibly [Triassic](/source/Triassic) periods. 

==Occurrence==
''Arctacanthus'' is known by two named species from the Permian, ''A. uncinatus'' and ''A. wyomingensis''.<ref>{{cite journal |last=Nielsen |first=Eigil |author-link=Eigil Nielsen (paleontologist) |year=1932 |title=Permo-Carboniferous fishes from East Greenland |journal=Meddelelser om Grønland |volume=86 |issue=3 |pages=1–63}}</ref><ref name=Branson1934>{{cite journal |last=Branson |first= C. C. |year=1934 |title=Permian Sharks of Wyoming and of East Greenland |journal=Science |volume=79 |issue=2054 |pages=431 |doi=10.1126/science.79.2054.431|pmid= 17756155 |bibcode= 1934Sci....79..431B }}</ref> The former was described from [Greenland](/source/Greenland) while the latter was described from the [United States](/source/United_States). They are known only by isolated hook-shaped "[ichthyolith](/source/ichthyolith)s" thought to represent dermal denticles of a [chimaera](/source/chimaera)n. Some have attributed these to teeth or [hybodont](/source/Hybodontiformes) cephalic spines. Similar ichthyoliths of much smaller size have been found in [Japan](/source/Japan) and [China](/source/China) in rocks of [Anisian](/source/Anisian) age. The large difference in age, location, and size means their attribution to this genus is uncertain; nonetheless, the species ''A. exiguus'' was named in Japan.<ref>{{cite journal |last1=Chen |first1=Lide |last2=Cuny |first2=Gilles |last3=Wang |first3=Xiaofeng |year=2007 |title=The chondrichthyan fauna from the Middle-Late Triassic of Guanling (Guizhou province, SW China) |journal=Historical Biology |volume=19 |issue=4 |pages=291–300 |doi=10.1080/08912960701248234|bibcode=2007HBio...19..291C |s2cid=128482370 }}</ref><ref>{{cite book |last=Yamagishi |first=H. |year=2004 |chapter=Elasmobranch remains from the Taho limestone (lower-Middle Triassic) of Ehime prefecture, Southwest Japan |title=Mesozoic fishes 3 — Systematics, Paleoenvironments and Biodiversity |editor1=G. Arratia |editor2=A. Tintori |pages=565–574}}</ref>

==References==
{{Reflist}}
{{Chondrichthyan genera|Es.}}
{{Taxonbar|from=Q99774850}}

Category:Prehistoric cartilaginous fish genera
Category:Permian Greenland
Category:Fossils of Greenland
Category:Permian Wyoming
Category:Fossils of Wyoming
Category:Hybodontiformes

{{paleo-cartilaginous-fish-stub}}

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Adapted from the Wikipedia article [Arctacanthus](https://en.wikipedia.org/wiki/Arctacanthus) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Arctacanthus?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.