''Idiognathoides'' is an extinct genus of conodonts.

Glen K. Merrill A glen is a valley, typically one that is long and bounded by gently sloped concave sides, unlike a ravine, which is deep and bounded by steep slopes. Whittow defines it as a "Scottish term for a deep valley in the Highlands" that is "narrower ...

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 ''Cavusgnathus'' is an extinct genus of conodonts. Glen K. Merrill A glen is a valley, typically one that is long and bounded by gently sloped concave sides, unlike a ravine, which is deep and bounded by steep slopes. Whittow defines it as ...

''. ''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 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, 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) is an internationally agreed upon reference point on a stratigraphic section which defines the lower boundary of a stage on the geologic time scale. The effort to define GSSPs is conducted b ...

candidate sections are the

Ural mountains The Ural Mountains ( ; rus, Ура́льские го́ры, r=Uralskiye gory, p=ʊˈralʲskʲɪjə ˈɡorɨ; ba, Урал тауҙары) or simply the Urals, are a mountain range that runs approximately from north to south through western ...

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

* * Conodont genera Pennsylvanian conodonts Fossil taxa described in 1933 {{conodont-stub