Auchenaspis

Auchenaspis
Temporal range: 443.7–416.0 Ma Silurian
Fossils at National Museum of Natural History, Paris
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Infraphylum: Agnatha
Class: †Osteostraci
Order: †Thyestiida
Genus: †Auchenaspis
Egerton 1857

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]

References

  1. ^ 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.
  2. ^ "The Paleobiology Database". Archived from the original on 2011-07-18. Retrieved 2010-03-13.
  3. ^ 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 (1–2): 193–197. doi:10.1144/GSL.JGS.1860.016.01-02.26. S2CID 130396486.
  4. ^ Sansom, R. (2007). "A Review of the Problematic Osteostracan Genus Auchenaspis and Its Role in Thyestidian Evolution". Palaeontology. 50 (4): 1001–1011. Bibcode:2007Palgy..50.1001S. doi:10.1111/j.1475-4983.2007.00686.x.


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