On the occurrence of the ammonite aptychi Lamellaptychus cf. rectecostatus (Peters, 1854) from the Ogrodzieniec quarry (southern Poland)

The largely Kimmeridgian-Tithonian (Late Jurassic) aptychus Lamellaptychus rectecostatus (Peters, 1854) is considered to represent the jaw apparatus of the ammonite superfamily Haploceratoidea (Family Oppeliidae). However, here, from the Ogrodzieniec quarry (southern Poland), we present its unusual allochthonous occurrence embedded in a perisphinctid, Perisphinctes (Kranosphinctes) sp., and co-occurring with a late early Oxfordian Cordatum Subzone (Cordatum Zone) ammonite assemblage. The assemblage includes Cardioceras (Cardioceras) cf. cordatum (Sowerby), Neocampylites delmontanus (Oppel), Lissoceratoides erato (d'Orbigny), Bukowskites distortus (Bukowski), Trimarginites cf. arolicus (Oppel), Glochiceras sp., Holcophylloceras zignodianum (d'Orbigny) and Euaspidoceras (Euaspidoceras) per-armatum (Sowerby).(c) 2021 Elsevier Masson SAS. All rights reserved.

Automated summary

In this study, a late Jurassic aptychus called Lamellaptychus rectecostatus was found embedded in an allochthonous perisphinctid specimen, alongside a late early Oxfordian Cordatum Subzone ammonite assemblage.