1966  Pronorites ultimus Ruzhentsev: 52, pl.5 fig.2.
     1971  Pronorites ultimus.-Ruzhentsev & Bogoslovskaia: 141.
     1975  Pronorites ultimus.-Popov: 113, pl.35 fig.10, pl.45  fig.9.

Species has 18 lobes, Megapronorites 20 lobes.