Campanellula capuensis was described as belonging to the Trochamminacea (trochospiral tests) and later transferred to the genus Orbitolinopsis of the Orbitolinidae (uniserial tests). Challenging its identity as a species of Orbitolinopsis, the most widely accepted classifications of agglutinated foraminifera reinstate Campanellula but retain its inclusion within the Orbitolinidae, subfamily Dictyoconinae. New material from the type locality and the San Lorenzello section (Matese Mountains, southern Apennines, Italy) as well as the construction of a 3D model allow to reinstate the original description as a low- to high-trochospirally (conical) coiled foraminifer with numerous chambers per whorl and to display an overall conical test morphology. An orbitolinid test construction including uniserial chambers (throughout the test or in its adult part) is absent. The conflicting opinions on taxonomic status of Campanellula are discussed leading to the removal from the order Loftusiina and the suborder Orbitolinina. Instead, Campanellula should be included into the order Lituolida and the suborder Verneuilinina. Campanellula capuensis represents a biostratigraphic and palaeobiogeographic marker taxon, restricted to upper Hauterivian–lower Barremian inner platform carbonates of the southern Neotethyan margin.

Key words: Foraminifera, Trochamminacea, biostratigraphy, calcareous agglutinated test, taxonomy, 3D reconstruction, Lower Cretaceous, Italy.

Felix Schlangintweit [felix.schlagintweit@gmx.de; ORCID: https://orcid.org/0000-0002-4024-4312], Lerchenauerstrasse 167, 80935 München, Germany. Sabrina Amodio [sabrina.amodio@uniparthenope.it; ORCID: https://orcid.org/0000-0002-8241-1262] (corresponding author), Dipartimento di Scienze e Tecnologie, Università degli Studi di Napoli “Parthenope”, Centro Direzionale Isola C4, 80143 Napoli, Italy. Filippo Barattolo [lippolo@unina.it; ORCID: https://orcid.org/0000-0003-4194-4764 ], Dipartimento di Scienze della Terra, dell’Ambiente e delle Risorse, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte Sant’Angelo, via Cintia 21, 80126 Napoli, Italy. Michel Septfontaine [septfontaine.m@bluewin.ch], Chemin des Pochattes 4, 1055 Froideville, Switzerland.