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

Abstract

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).