Archeognathus

Archeognathus Temporal range: Mid Ordovician PreЄ Є O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	incertae sedis
Genus:	Archeognathus Cullison, 1938[1]
Species
A. primus Cullison, 1938 (type) A. carinatus Cullison, 1938
Synonyms
Coleodus

Coleodus redirects here. For the bony fish, see Coelodus.

Archaeognathus is a fossilized jaw apparatus from the Ordovician that has been compared to the conodonts and vertebrates, yet remains unclassified.^[2]

It is a component of a jaw apparatus that also contains the Coleodus apparatus (which is therefore assumed to be synonymous).^[3]

References

1. ^ Cullison, J. S. (1938). "Dutchtown Fauna of Southeastern Missouri". Journal of Paleontology 12 (3): 219–228. doi:10.2307/1298590. JSTOR 1298590.  edit
2. ^ Klapper, G.; Bergström, S. M. (1984). "The Enigmatic Middle Ordovician Fossil Archeognathus and Its Relations to Conodonts and Vertebrates". Journal of Paleontology 58 (4): 949–976. JSTOR 1304860.  edit
3. ^ Liu, H. P.; McKay, R. M.; Young, J. N.; Witzke, B. J.; McVey, K. J.; Liu, X. (2006). "A new Lagerstätte from the Middle Ordovician St. Peter Formation in northeast Iowa, USA". Geology 34: 969. Bibcode 2006Geo....34..969L. doi:10.1130/G22911A.1.  edit