1896  Goniatites lunatus Miller & Gurley, p.41, pl.5 fig.4,5.
     1966  Beyrichoceratoides lunatus.-Furnish & Knapp, p.306.

Originally described from Elkhorn Creeek, Morrowan strata.

Lectotype SD Furnish & Knapp, 1966, p.306, Univ.Chicago 6217, of lower Chesterian age, probably not belonging
to normal "Elkhorn Creek" faunas of Morrowan age because of suture line of lectotype.
"Consequently, the general locality from which G.K.Greene derived Goniatites and Beyrichoceras must be regarded as uncertain, although strata of Chester age have been reproted nearby along the Pine Mountain Thrust."