Ammonite-calibrated nautiloid occurrences from the Callovian-Oxfordian (Middle-Upper Jurassic) deposits of southern Poland

ABSTRACT

The contribution records and illustrates one new and nine other nautiloid species from six sections of southern Poland (Wysoka, Zalas, Ogrodzieniec, Przybynów, Rzędkowice and Żarki) spanning in age from the early Callovian to the late Oxfordian (Middle to Late Jurassic). This contribution also provides the first precise age-constrained record of nautiloid occurrences based on co-occurring ammonites, and refines the biostratigraphy of the six studied sections from southern Poland. Based on the ammonite data, the study sections are assigned to the lower Callovian Koenigi Zone (Zalas and Wysoka), lower Oxfordian Cordatum Subzone, Cordatum Zone (Ogrodzieniec and Przybynów) and upper Oxfordian Stenocycloides Subzone, Bifurcatus Zone (Rzędkowice and Żarki). A new species, Cenoceras polonicum sp. nov. (Wysoka) is reported from Poland, along with the first records of Eutrephoceras rotundum (Crick) (Zalas), Paracymatoceras cf. mondegoense Tintant (Wysoka), Pseudaganides helveticus Loesch (Ogrodzieniec) and with better stratigraphy of Xenocheilus krenkeli (Loesch) (Ogrodzieniec and Żarki), Pseudaganides aganiticus (Schlotheim) (Ogrodzieniec), P. aff. aganiticus (Schlotheim) (Przybynów and Rzędkowice), Pseudaganides sp. (Żarki), ‘Paracenoceras’ calloviense (Oppel) and Paracenoceras blakei Jeannet (Zalas). New middle Bathonian occurrence of ‘P’. calloviense (Oppel) associated with Micromphalites (Clydomphalites) clydocromphalus Arkell is also reported from Kachchh (western India).

KEYWORDS:

• Nautiloids
• ammonites
• Callovian
• Oxfordian
• southern Poland

Acknowledgments

We are very grateful to the two reviewers, Dr. Horacio Parent (Argentina) and an anonymous reviewer for their constructive comments and suggestions that greatly improved the manuscript. SJ also thanks Dr. Gareth J. Dyke, Editor-in-Chief of Historical Biology, for his continued support and patience and to Professor Malcolm B. Hart, Editor-in-Chief of the Proceedings of the Geologists’ Association, for constructive suggestions. Rafał Kaucz, Damian Kuźma and Rafał Lach are acknowledged for their help during the fieldwork and the loan of some specimens for examination. This research was supported financially by the ‘Fast Track Grants 2.0 Back2Mobility’ (University of Silesia in Katowice, Faculty of Natural Sciences) to SJ.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the ‘Fast Track Grants 2.0 Back2Mobility