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Neognathodus

From Wikipedia, the free encyclopedia

Neognathodus
Temporal range: Bashkirian–Moscovian
Scientific classification
Kingdom:
Phylum:
Class:
Genus:
Neognathodus

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

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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

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  • 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
[edit]
  • "Neognathodus" at the Encyclopedia of Life
  • "Neognathodus". Paleobiology Database. Retrieved 8 July 2016.