Auchenaspis

{{Short description|Extinct genus of jawless fishes}} {{Italic title}} {{Automatic_taxobox | image = Auchenaspis salteri.JPG | image_caption = Fossils at National Museum of Natural History, Paris | fossil_range = {{Fossil range|443.7|416.0}}<small>Silurian</small> | taxon = Auchenaspis | authority = Egerton 1857 }}

'''''Auchenaspis salteri''''' is an extinct species of armored jawless fish of the order Thyestiida from the Late Silurian of England.<ref name=Sepkoski>{{cite journal|last=Sepkoski |first=Jack |title=A compendium of fossil marine animal genera (Cephalopoda entry) |journal=Bulletins of American Paleontology |volume=363 |pages=1–560 |year=2002 |url=http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=611&rank=class |access-date=2007-12-20 |url-status=dead |archive-url=https://web.archive.org/web/20110723131237/http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=611&rank=class |archive-date=July 23, 2011 }}</ref><ref>{{cite web|url=http://flatpebble.nceas.ucsb.edu/cgi-bin/bridge.pl?action%3DdisplayTaxonomicNamesAndOpinions%26reference_no%3D6930%26display%3Dopinions |title=The Paleobiology Database |access-date=2010-03-13 |url-status=dead |archive-url=https://web.archive.org/web/20110718010242/http://flatpebble.nceas.ucsb.edu/cgi-bin/bridge.pl?action=displayTaxonomicNamesAndOpinions&reference_no=6930&display=opinions |archive-date=2011-07-18 }}</ref> In England, ''A. salteri''<nowiki>'</nowiki>s fossils are found in extreme abundance in the Lower Old Red Sandstone strata in Ledbury, Herefordshire.<ref>{{Cite journal | doi = 10.1144/GSL.JGS.1860.016.01-02.26| title = On the Passage-beds from the Upper Silurian Rocks into the Lower Old Red Sandstone, at Ledbury, Herefordshire| journal = Quarterly Journal of the Geological Society| volume = 16| pages = 193–197| year = 1860| last1 = Symonds | first1 = W. S.| issue = 1–2| s2cid = 130396486}}</ref>

''A. salteri'' strongly resembles the thyestiids ''Procephalaspis'' and ''Thyestes'', and within Thyestiida, it represents a transitional form between the primitive, superficially ''Cephalaspis''-like forms, such as ''Thyestes'', and the more specialized tremataspid thyestiids, like ''Tremataspis'', ''Dartmuthia'', or ''Dobraspis'', whose headshields tend to resemble hot buns or horseshoe crabs.<ref>{{Cite journal | doi = 10.1111/j.1475-4983.2007.00686.x| title = A Review of the Problematic Osteostracan Genus Auchenaspis and Its Role in Thyestidian Evolution| journal = Palaeontology| volume = 50| issue = 4| pages = 1001–1011| year = 2007| last1 = Sansom | first1 = R. | bibcode = 2007Palgy..50.1001S| doi-access = }}</ref>

==References== {{Reflist}}

Category:Osteostraci genera Category:Silurian fish of Europe Category:Fossils of Great Britain