Patrognathus

Patrognathus is an extinct genus of conodonts.

Patrognathus Temporal range: Tournaisian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Conodonta
(unranked):	†Prioniodontida
Order:	†Ozarkodinida
Superfamily:	†Polygnathacea
Family:	†Cavusgnathidae
Genus:	†Patrognathus Rhodes, Austin & Druce, 1969[1]
Species
†Patrognathus andersoni †Patrognathus crassus †Patrognathus variabilis

Use in stratigraphy

The Tournaisian, the oldest age of the Mississippian (also known as Lower Carboniferous) contains eight conodont biozones, four of which contain Patrognathus species:

• the zone of Siphonodella quadruplicata and Patrognathus andersoni (upper zone of Patrognathus andersoni)
• the lower zone of Patrognathus andersoni
• the zone of Patrognathus variabilis
• the zone of Patrognathus crassus