''Idiognathoides'' is an extinct genus of conodonts.
Glen K. Merrill stated in 1963 that "conodont workers have considered ''Idiognathoides'' to be a junior synonym of ''
Polygnathodella'' but it now proves to be a junior synonym of ''
Cavusgnathus''. ''Polygnathodella'' and ''Cavusgnathus'' are shown to form a transitional series."
[Polygnathodella Harlton, 1933, or Idiognathoides Harris and Hollingsworth, 1933? Glen K. Merrill, Journal of Paleontology, March 1963, volume 37, issue 2]
abstract
Use in stratigraphy
The
Bashkirian
The Bashkirian is in the International Commission on Stratigraphy geologic timescale the lowest stage (stratigraphy), stage or oldest age (geology), age of the Pennsylvanian (geology), Pennsylvanian. The Bashkirian age lasted from to Mega annu ...
, the oldest age of the
Pennsylvanian (also known as Upper Carboniferous), contains six biozones based on conodont index fossils, one of which contains an ''Idiognathoides'' species : the zone of ''Idiognathoides sinuatus''.
The base of the
Moscovian
Moscovian may refer to:
*An inhabitant of Moscow, the capital of Russia
*Something of, from, or related to Moscow
*Moscovian (Carboniferous)
The Moscovian is in the International Commission on Stratigraphy, ICS geologic timescale a stage (strat ...
, the second stage in the Pennsylvanian, is close to the first appearances of the conodonts ''
Declinognathodus donetzianus'' and ''Idiognathoides postsulcatus''. The
GSSP
A Global Boundary Stratotype Section and Point (GSSP), sometimes referred to as a golden spike, is an internationally agreed upon reference point on a stratigraphic section which defines the lower boundary of a stage on the geologic time scale. ...
candidate sections are the
Ural Mountains
The Ural Mountains ( ),; , ; , or simply the Urals, are a mountain range in Eurasia that runs north–south mostly through Russia, from the coast of the Arctic Ocean to the river Ural (river), Ural and northwestern Kazakhstan. or in
Nashui, Luodian County, Guizhou, China.
References
* Considerations of the Idiognathoides - Declinognathodus - Neognathodus complex of Middle Carboniferous platform conodonts. David L. Dunn, Lethaia, January 1971, volume 4, issue 1, pages 15–19,
External links
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Conodont genera
Pennsylvanian conodonts
Fossil taxa described in 1933
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