# Neognathodus

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{{Short description|Extinct genus of jawless fishes}}
{{Automatic taxobox
| fossil_range = {{fossil range|Bashkirian|Moscovian}}
| image =
| taxon = Neognathodus
| authority = [Dunn](/source/David_L._Dunn), [1968](/source/1968_in_paleontology)
| subdivision_ranks = Species
| subdivision = 
* †''Neognathodus askynensis''
* †''Neognathodus atokaensis''
* †''Neognathodus bassleri''
* †''Neognathodus colombiensis''
* †''Neognathodus medexultimus''
* †''Neognathodus roundyi''
* †''Neognathodus symmetricus''
* †''Neognathodus uralicus''
| synonyms =
}}

'''''Neognathodus''''' is an extinct genus of [conodont](/source/conodont)s.

==Use in stratigraphy==
The [Bashkirian](/source/Bashkirian), the oldest age of the [Pennsylvanian](/source/Pennsylvanian_(geology)) (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](/source/Moscovian_(Carboniferous)), 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](/source/Streptognathodus) cancellosus''
* the zone of ''Neognathodus medexultimus'' and ''[Streptognathodus](/source/Streptognathodus) concinnus''
* the zone of ''Neognathodus uralicus''

==References==
{{Reflist}}
*  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 ([https://www.jstor.org/stable/1302938 Stable URL])
* Apparatus of the Pennsylvanian Conodont genus Neognathodus. Glen K Merrill and Peter H Von Bitter, [Royal Ontario Museum](/source/Royal_Ontario_Museum), 1977, pages 11–13
* Neognathodus and the species concept in conodont paleontology. Glen K Merrill, Bollettino della Società Paleontologica Italiana, January 1998, volume 37, issue 2, pages 465-473

==External links==
* {{eol|42349488}}
* {{fossilworks|id=33985|title=''Neognathodus''|access-date=8 July 2016}}

{{Taxonbar|from=Q28431143}}

Category:Ozarkodinida
Category:Conodont genera
Category:Pennsylvanian conodonts
Category:Bashkirian life
Category:Moscovian life
Category:Pennsylvanian first appearances
Category:Pennsylvanian extinctions
Category:Fossil taxa described in 1968

{{conodont-stub}}

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Adapted from the Wikipedia article [Neognathodus](https://en.wikipedia.org/wiki/Neognathodus) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Neognathodus?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.