Frau C. The systematic affinities between the Lower Cretaceous Ammonoidea Protacanthoplites abichi (Anthula, 1900) and Acanthohoplites aschiltaensis (Anthula, 1900). EJT [Internet]. 2023Aug.16 [cited 2024May17];888(1):137–158. Available from: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/2237