Auchenaspis
| Auchenaspis Temporal range: 443.7–416.0 Ma | |
|---|---|
 | |
| Fossils at National Museum of Natural History, Paris | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| 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][3] In England, A. salteri's fossils are found in extreme abundance in the Lower Old Red Sandstone strata in Ledbury, Herefordshire.[4]
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
- ↑ http://www.paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=34114&is_real_user=0
- ↑ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology 364: p.560. http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=611&rank=class. Retrieved 2007-12-20.
- ↑ http://flatpebble.nceas.ucsb.edu/cgi-bin/bridge.pl?action=displayTaxonomicNamesAndOpinions&reference_no=6930&display=opinions
- ↑ 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.
- ↑ 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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