UGA Stratigraphy Lab

The data is in the strata

Pterygometopus

Species

Pterygometopus troosti
Occurrence: Murfreesboro, Pierce, Ridley, Lebanon
Reference: Wilson, 1949
Ludvigsen and Chatterton (1982) report that Achatella is the only pterygometopine occurring in the Ordovician rocks of Laurentia; I am unaware of the current taxonomic assignment of P. troosti