Perisphinctes bernensis Fossil Ammonite – Callovian Jurassic – Zalas Poland – Authentic Specimen with Certificate

Description

This listing features a Perisphinctes bernensis fossil ammonite from the Callovian Stage of the Middle Jurassic, found in Zalas, near Kraków, Poland. A fine representative of the Perisphinctidae family, this species is known for its elegant ribbing and stratigraphic importance in the Upper Bathonian–Callovian ammonite succession of Central Europe.

This is a 100% genuine fossil specimen, carefully selected and preserved. The photograph shows the exact specimen you will receive, with a 1cm scale cube visible in the image—please refer to photos for complete sizing information.

Fossil Classification:

• Species: Perisphinctes bernensis
• Genus: Perisphinctes
• Family: Perisphinctidae
• Superfamily: Perisphinctoidea
• Order: Ammonitida
• Class: Cephalopoda
• Phylum: Mollusca

Geological & Palaeontological Details:

• Geological Period: Jurassic
• Epoch: Middle Jurassic
• Stage: Callovian (approx. 166 – 163.5 million years ago)
• Location Found: Zalas, Lesser Poland Voivodeship, Poland
• Lithology: Typically embedded within clay-rich marls or oolitic limestone of the Polish Jura Chain
• Depositional Environment: Epicontinental shallow marine shelf with quiet water sedimentation—favourable for ammonite preservation
• Biozone (if inferred): Possibly from the Bernense or Athleta Zones, within the Upper Callovian ammonite biozonation

Morphology & Diagnostic Features:

• Moderate to large shell size with evolute coiling
• Distinct, regular bifurcating ribs covering the whorls
• Venter rounded to slightly keeled, with well-defined growth lines
• Whorl cross-section moderately compressed
• Ribbing pattern used in zonal ammonite stratigraphy in European Callovian successions

Notable Information:

• Perisphinctes bernensis is a biostratigraphically important ammonite species, recognised in Central European stratigraphy
• Specimens from Zalas contribute to the understanding of the Polish Jura palaeobiogeography and ammonoid evolution
• The species is named after the Bernese region of Switzerland, with type specimens initially described in Western Europe, then correlated in Poland

Why This Fossil Is Special:

✔ 100% Genuine Fossil

✔ Comes with Certificate of Authenticity

✔ Exact specimen as shown

✔ Rich in stratigraphic and scientific significance

✔ Display-quality specimen with elegant ribbing

✔ Sourced from a classic Jurassic locality

This beautiful Perisphinctes bernensis ammonite fossil is a collector’s gem and an ideal piece for display, education, or research. Whether you’re a palaeontology enthusiast or seeking a unique gift, this specimen delivers both historical value and natural elegance.