https://www.usgs.gov/publications/chondrichthyans-pennsylvanian-desmoinesian-naco-formation-central-arizona
Chondrichthyans from the Pennsylvanian (Desmoinesian) Naco Formation of central Arizona | U.S....
Teeth, spines, and dermal denticles of chondrichthyans are reported from the Middle Pennsylvanian (Desmoinesian) Naco Formation of central Arizona. The most...
from thenaco formation