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Fossil Ammonite – Cardioceras persecans – Oxfordian, Jurassic – Zalas, Poland – Genuine Specimen with Certificate
Fossil Ammonite – Cardioceras persecans – Oxfordian, Jurassic – Zalas, Poland – Genuine Specimen with Certificate - Image 2

Fossil Ammonite – Cardioceras persecans – Oxfordian, Jurassic – Zalas, Poland – Genuine Specimen with Certificate

£9.00

Fossil Ammonite – Cardioceras persecans

Geological Period: Jurassic

Stage: Oxfordian (~163–157 million years ago)

Locality: Zalas, Lesser Poland Voivodeship, Poland

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity

This listing features a beautifully preserved fossil ammonite of the species Cardioceras persecans, a diagnostic and classic representative of the Oxfordian marine fauna of the Jurassic period. It was discovered at Zalas, a historically important locality for Upper Jurassic ammonites in Poland, well-known for its finely bedded marl and limestone layers rich in cephalopods.

Taxonomy & Scientific Context:

  • Genus: Cardioceras
  • Species: persecans
  • Family: Cardioceratidae
  • Superfamily: Stephanoceratoidea
  • Order: Ammonitida
  • Formally Identified by: Arkell (based on morphological comparisons and Oxfordian zonation)

Morphology & Notable Features:

Cardioceras persecans is characterised by its typically discoidal shell with a relatively open umbilicus and strong, bifurcating ribs that cross the venter cleanly. The whorl section tends to be compressed, and the ornamentation is particularly prominent, often forming sharp ridges and nodes—making specimens such as this highly sought after by collectors.

This genus is well-known for its short stratigraphic range, making it a key biostratigraphic indicator in the Upper Jurassic ammonite zonation.

Geological & Environmental Information:

  • Zone/Biozone: Cardioceras cordatum to Cardioceras densiplicatum zones (Oxfordian ammonite zonation)
  • Depositional Environment: Shallow marine epicontinental shelf conditions. The Zalas region in Poland preserves marine sediments indicative of a warm, subtropical sea with fluctuating oxygen levels and diverse invertebrate fauna.
  • Stratigraphy: Oxfordian marl-limestone alternations with distinct cephalopod-rich beds.
  • Preservation Quality: Excellent, with clear suture lines and prominent ribbing visible across the shell. Ideal for both study and display.

Specimen Display & Size:

  • The actual fossil shown in the photos is the one you will receive.
  • Scale Rule Squares / Cube = 1cm – please see photos for full sizing.

Ideal For:

  • Collectors of Jurassic ammonites
  • Palaeontology educators
  • Students studying European marine biostratigraphy
  • Fossil lovers looking for visually striking specimens from classic localities

This is a standout piece and a fantastic representative of the Oxfordian ammonite fauna from Central Europe.

(Actual as seen)

Only 1 left in stock

SKU: UF4512 Category:

Description

Fossil Ammonite – Cardioceras persecans

Geological Period: Jurassic

Stage: Oxfordian (~163–157 million years ago)

Locality: Zalas, Lesser Poland Voivodeship, Poland

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity

This listing features a beautifully preserved fossil ammonite of the species Cardioceras persecans, a diagnostic and classic representative of the Oxfordian marine fauna of the Jurassic period. It was discovered at Zalas, a historically important locality for Upper Jurassic ammonites in Poland, well-known for its finely bedded marl and limestone layers rich in cephalopods.

Taxonomy & Scientific Context:

  • Genus: Cardioceras
  • Species: persecans
  • Family: Cardioceratidae
  • Superfamily: Stephanoceratoidea
  • Order: Ammonitida
  • Formally Identified by: Arkell (based on morphological comparisons and Oxfordian zonation)

Morphology & Notable Features:

Cardioceras persecans is characterised by its typically discoidal shell with a relatively open umbilicus and strong, bifurcating ribs that cross the venter cleanly. The whorl section tends to be compressed, and the ornamentation is particularly prominent, often forming sharp ridges and nodes—making specimens such as this highly sought after by collectors.

This genus is well-known for its short stratigraphic range, making it a key biostratigraphic indicator in the Upper Jurassic ammonite zonation.

Geological & Environmental Information:

  • Zone/Biozone: Cardioceras cordatum to Cardioceras densiplicatum zones (Oxfordian ammonite zonation)
  • Depositional Environment: Shallow marine epicontinental shelf conditions. The Zalas region in Poland preserves marine sediments indicative of a warm, subtropical sea with fluctuating oxygen levels and diverse invertebrate fauna.
  • Stratigraphy: Oxfordian marl-limestone alternations with distinct cephalopod-rich beds.
  • Preservation Quality: Excellent, with clear suture lines and prominent ribbing visible across the shell. Ideal for both study and display.

Specimen Display & Size:

  • The actual fossil shown in the photos is the one you will receive.
  • Scale Rule Squares / Cube = 1cm – please see photos for full sizing.

Ideal For:

  • Collectors of Jurassic ammonites
  • Palaeontology educators
  • Students studying European marine biostratigraphy
  • Fossil lovers looking for visually striking specimens from classic localities

This is a standout piece and a fantastic representative of the Oxfordian ammonite fauna from Central Europe.

Additional information

Era

Jurassic
Origin

Poland

Jurassic Information

The Jurassic Period (201–145 million years ago) was the golden age of dinosaurs, with iconic species like Brachiosaurus, Stegosaurus, and Allosaurus dominating the land. It was a time of warm, humid climates, with high sea levels that created vast shallow seas, supporting abundant marine reptiles, ammonites, and early coral reefs. The first birds, such as Archaeopteryx, evolved from small theropod dinosaurs, while early mammals remained small and nocturnal. Lush forests of cycads, conifers, and ferns covered the land, providing food for giant herbivores. The breakup of the supercontinent Pangaea accelerated, shaping Earth's geography and setting the stage for the diverse ecosystems of the Cretaceous.

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