1913  Postprolobites Yakowlewi Wedekind: 87, pl.8 fig.4-6, text-fig.5e.
     1923  Postprolobites Yakowlewi.-Schindewolf: 405, pl.16 fig.6-8, textfig.13a.
     1965  Prionoceras yakowlewi.-Flügel & Kropfitsch-Flügel: 26 [not described]. [= P. divisum, TAX863].