Neognathodus

Neognathodus is an extinct genus of 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 Neognathodus species:
 * the zone of Neognathodus atokaensis
 * the zone of Neognathodus askynensis

The base of the Moscovian, the second stage in the Pennsylvanian, can biostratigraphically be divided into five conodont biozones, three of which contain Neognathodus species:
 * the zone of Neognathodus roundyi and Streptognathodus cancellosus
 * the zone of Neognathodus medexultimus and Streptognathodus concinnus
 * the zone of Neognathodus uralicus