Auchenaspis Explained

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

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.[4]

Notes and References

  1. Sepkoski . Jack . A compendium of fossil marine animal genera (Cephalopoda entry) . Bulletins of American Paleontology . 363 . 1–560 . 2002 . 2007-12-20 . dead . https://web.archive.org/web/20110723131237/http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=611&rank=class . July 23, 2011 .
  2. Web site: The Paleobiology Database . 2010-03-13 . dead . https://web.archive.org/web/20110718010242/http://flatpebble.nceas.ucsb.edu/cgi-bin/bridge.pl?action=displayTaxonomicNamesAndOpinions&reference_no=6930&display=opinions . 2011-07-18 .
  3. 10.1144/GSL.JGS.1860.016.01-02.26. 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. 193–197. 1860. Symonds . W. S.. 1–2. 130396486.
  4. 10.1111/j.1475-4983.2007.00686.x. A Review of the Problematic Osteostracan Genus Auchenaspis and Its Role in Thyestidian Evolution. Palaeontology. 50. 4. 1001–1011. 2007. Sansom . R. . 2007Palgy..50.1001S.

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