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Idiognathodus; Temporal range: Carboniferous PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Conodonta
Order:	†Ozarkodinida
Family:	†Idiognathodontidae
Genus:	†Idiognathodus; Gunnell 1931
Species
	†Idiognathodus boardmani Hogancamp & Barrick 2017; †Idiognathodus craticulinodosus Ishida, Suzuki & Inada 2013; †Idiognathodus espinamaenis Méndez 2012; †Idiognathodus itaitubensis Cardoso, Sanz-López & Blanco-Ferrera 2017; †Idiognathodus lateralis Hogancamp, Barrick & Strauss 2016; †Idiognathodus mendezi Méndez 2012; †Idiognathodus sagittatus; †Idiognathodus simulator; †Idiognathodus sinuosus; †Idiognathodus toretzianus;

Idiognathodus is an extinct conodont genus in the family Idiognathodontidae.

Use in stratigraphy

The species Idiognathodus simulator made its first appearance during the Gzhelian, the youngest age of the Pennsylvanian (late Carboniferous).

Two species (Idiognathodus toretzianus and Idiognathodus sagittatus) are amongst the three conodonts forming the biozones of the Kasimovian, the third stage in the Pennsylvanian.

One species (Idiognathodus sinuosus) is an index fossil of a biozone of the Bashkirian, the oldest age of the Pennsylvanian, amongst six biozones based on conodonts.

References

^ Conodonts from the Fort Scott Limestone of Missouri. Frank H. Gunnell, Journal of Paleontology, Vol. 5, No. 3 (Sep. 1931), pages 244-252 (Stable URL)
^ Visean–Moscovian conodont biostratigraphy of the Ko-yama Limestone Group, Akiyoshi Belt, SW Japan. Keisuke Ishida, Sigeyuki Suzuki and Noriyuki Inada, Natural Science Research, Univ. Tokushima, 2013, volume 27 (3), pages 29–52
^ ^a ^b Moscovian conodonts from the Nevandi River Valley (Cantabrian Zone, North Spain). C.A. Méndez, Trabajos de Geología, 2012, volume 32, pages 63–75
^ ^a ^b Geometric morphometric analysis and taxonomic revision of the Gzhelian (Late Pennsylvanian) conodont Idiognathodus simulator from North America. Nicholas J. Hogancamp, James E. Barrick and Richard E. Strauss, Acta Palaeontologica Polonica, 2016 (in press), doi:10.4202/app.00198.2015