Opinions from M. Urlichs 2017
- 'Ammonites (Ceratites) achelous is recombined as Klipsteinia achelous'
- 'Ammonites (Ceratites) busiris is recombined as Arpadites busiris'
- 'Ammonites aequinodosus is a subjective synonym of Protrachyceras ladinum'
- 'Ammonites bidenticulatus is a subjective synonym of Arpadites busiris'
- 'Ammonites furcatus is recombined as Sirenotrachyceras furcatum'
- 'Ammonites hirschi belongs to Ammonites' according to Laube 1869
- 'Ammonites hirschi is recombined as Muensterites hirschi'
- 'Ammonites hoplophorus is a subjective synonym of Klipsteinia achelous'
- 'Ammonites nodocostatus is a subjective synonym of Sirenotrachyceras furcatum'
- 'Ammonites subdenticulatus is a subjective synonym of Arpadites busiris'
- 'Arpadites belongs to Arpaditinae'
- 'Arpaditinae belongs to Trachyceratidae'
- 'Ceratites agassizii is a subjective synonym of Sirenotrachyceras furcatum'
- 'Ceratites basileus is a subjective synonym of Arpadites busiris'
- 'Ceratites jaegeri is a subjective synonym of Muensterites okeani'
- 'Ceratites okeani is recombined as Muensterites okeani'
- 'Dinarites eduardi is a subjective synonym of Klipsteinia radiata'
- 'Goniatites armatus is a subjective synonym of Klipsteinia achelous'
- 'Goniatites friesei is a subjective synonym of Klipsteinia achelous'
- 'Goniatites radiatus is recombined as Klipsteinia radiata'
- 'Klipsteinia belongs to Arpaditinae'
- 'Klipsteinia karreri is recombined as Muensterites karreri'
- 'Klipsteinia nataliae belongs to Klipsteinia'
- 'Muensterites belongs to Trachyceratinae'
- 'Protrachyceras belongs to Protrachyceratinae'
- 'Protrachyceras hadwigae belongs to Protrachyceras' according to Mojsisovics 1893
- 'Protrachyceras hadwigae is recombined as Sirenotrachyceras hadwigae'
- 'Protrachyceratinae belongs to Trachyceratidae'
- 'Sirenitinae belongs to Trachyceratidae'
- 'Sirenotrachyceras belongs to Sirenitinae'
- 'Trachyceras ladinum belongs to Trachyceras' according to Mojsisovics 1882
- 'Trachyceras ladinum is recombined as Protrachyceras ladinum'
- 'Trachyceras rudolphi is recombined as Sirenotrachyceras rudolphi'
- 'Trachycerataceae is corrected as Trachyceratoidea and belongs to Ceratitida'
- 'Trachyceratidae belongs to Trachyceratoidea'
- 'Trachyceratinae belongs to Trachyceratidae'