Neognathodus
Neognathodus is an extinct genus of conodonts.The Bashkirian, the oldest age of the Pennsylvanian, 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
