Biology:Neognathodus

Short description: Extinct genus of jawless fishes

Neognathodus Temporal range: Bashkirian–Moscovian PreЄ Є O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Conodonta
Genus:	†Neognathodus Dunn, 1968
Species
†Neognathodus askynensis †Neognathodus atokaensis †Neognathodus bassleri †Neognathodus colombiensis †Neognathodus medexultimus †Neognathodus roundyi †Neognathodus symmetricus †Neognathodus uralicus

Neognathodus is an extinct genus of conodonts.

Use in stratigraphy

The Bashkirian, the oldest age of the Pennsylvanian (also known as Upper Carboniferous), contains six biozones based on conodont index fossils, two of which contain Neognathodus species:

• the zone of Neognathodus atokaensis
• the zone of Neognathodus askynensis

The base of the Moscovian, the second stage in the Pennsylvanian, can biostratigraphically be divided into five conodont biozones, three of which contain Neognathodus species:

• the zone of Neognathodus roundyi and Streptognathodus cancellosus
• the zone of Neognathodus medexultimus and Streptognathodus concinnus
• the zone of Neognathodus uralicus

References

• Taxonomy, Phylogeny, and Biostratigraphy of Neognathodus in Appalachian Pennsylvanian Rocks. Glen K. Merrill, Journal of Paleontology, Vol. 46, No. 6 (Nov., 1972), pages 817-829 (Stable URL)
• Apparatus of the Pennsylvanian Conodont genus Neognathodus. Glen K Merrill and Peter H Von Bitter, Royal Ontario Museum, 1977, pages 11–13
• Neognathodus and the species concept in conodont paleontology. Glen K Merrill, Bollettino della Societa Paleontologica Italiana, January 1998, volume 37, issue 2, pages 465-473

External links

• Neognathodus at fossilworks.org (retrieved 8 July 2016)

Wikidata ☰ Q28431143 entry