Declinognathodus

Declinognathodus 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:	†Declinognathodus Dunn, 1966^[1]
Species
†Declinognathodus bernesgae †Declinognathodus donetzianus †Declinognathodus inaequalis †Declinognathodus lateralis †Declinognathodus marginodosus †Declinognathodus nevadensis (type) †Declinognathodus noduliferus †Declinognathodus praenoduliferus

Declinognathodus is an extinct genus of platform 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 Declinognathodus species:

the zone of Declinognathodus marginodosus,
the zone of Declinognathodus noduliferus.

The GSSP point is at Arrow Canyon, Nevada, USA, with the first appearance of Declinognathodus nodiliferus.

The base of the Moscovian, the second stage in the Pennsylvanian, is close to the first appearances of the conodonts Declinognathodus donetzianus and Idiognathoides postsulcatus. The Moscovian can biostratigraphically be divided into five conodont biozones, one of which contain a Declinognathodus species : the zone of Declinognathodus donetzianus. The GSSP candidate sections are the Ural mountains or in Nashui, Luodian County, Guizhou, China.

References

↑ New Pennsylvanian Platform Conodonts from Southwestern United States. D. L. Dunn, Journal of Paleontology, Vol. 40, No. 6 (Nov., 1966), pages 1294-1303 (Stable URL)

Early evolution of Declinognathodus close to the Mid-Carboniferous Boundary interval in the Barcaliente type section (Spain). Javier Sanz-López and Silvia Blanco-Ferrera, Palaeontology, September 2013, Volume 56, Issue 5, pages 927–946, doi:10.1111/pala.12025
Conodont chronostratigraphical resolution and Declinognathodus evolution close to the Mid-Carboniferous Boundary in the Barcaliente Formation type section, NW Spain. Javier Sanz-López, Silvia Blanco-Ferrera and Luis C. Sánchez de Posada, Lethaia, October 2013, Volume 46, Issue 4, pages 438–453, doi:10.1111/let.12021

External links

Declinognathodus at the Encyclopedia of Life
Declinognathodus at fossilworks.org (retrieved 9 July 2016)

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