Auchenaspis

Auchenaspis salteri is an extinct species of armored jawless fish of the order Thyestiida from the Late Silurian of England.[1][2][3] In England, A. salteri's fossils are found in extreme abundance in the Lower Old Red Sandstone strata in Ledbury, Herefordshire.[4]

Auchenaspis
Temporal range: 443.7–416.0 Ma Silurian
Fossils at National Museum of Natural History, Paris
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Osteostraci
Order:
Thyestiida
Genus:
Auchenaspis

Egerton 1857

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.[5]

References
  1. http://www.paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=34114&is_real_user=0
  2. Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 363: 1–560. Archived from the original on July 23, 2011. Retrieved 2007-12-20.
  3. "Archived copy". Archived from the original on 2011-07-18. Retrieved 2010-03-13.CS1 maint: archived copy as title (link)
  4. Symonds, W. S. (1860). "On the Passage-beds from the Upper Silurian Rocks into the Lower Old Red Sandstone, at Ledbury, Herefordshire". Quarterly Journal of the Geological Society. 16: 193. doi:10.1144/GSL.JGS.1860.016.01-02.26.
  5. Sansom, R. (2007). "A Review of the Problematic Osteostracan Genus Auchenaspis and Its Role in Thyestidian Evolution". Palaeontology. 50 (4): 1001. doi:10.1111/j.1475-4983.2007.00686.x.


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