Phylum Chordata | ||
![]() | ||
Genus †GnathodusPander, 1856 People also search for Lochriea, Cavusgnathus, Siphonodella |
Gnathodus is an extinct conodont genus in the family Idiognathodontidae.
Use in stratigraphy
The Tournaisian, the oldest age of the Mississippian (also known as Lower Carboniferous), contains eight conodont biozones, 3 of which are defined by Gnathodus species:
The Visean, the second age of the Mississippian, contains four conodont biozones, two of which are defined by Gnathodus species:
The Serpukhovian, the third or youngest age of the Mississippian, includes four conodont biozones, two of which are defined by Gnathodus species:
References
Gnathodus Wikipedia(Text) CC BY-SA