Aeronian (Llandovery, Silurian) conodonts from the Densmore Creek Phosphate Bed and the Budd Road Phosphate Bed, Clinton Group, western New York State1.

Conodonts from the Densmore Creek Phosphate Bed at the base of the Maplewood Shale in Irondequoit, New York, include Panderodus unicostatus, Pranognathus tenuis, and Icriodella discreta. The taxa Ozarkodina cf. Oz. hassi, Pranognathus tenuis, Oulodus panuarensis, Panderodus unicostatus, Panderodus recurvatus, and Pseudooneotodus beckmanni were recovered from the overlying Budd Road Phosphate Bed at the base of the Reynales Limestone near Lockport, New York. The specimens from both beds are indicative of the Pranognathus tenuis Zone, which correlates to the lower to middle Aeronian, and indicate that the Budd Road Phosphate Bed at Lockport was deposited in a more offshore environment than the Densmore Creek Phosphate Bed at Irondequoit. [ABSTRACT FROM AUTHOR]