ACRIOCERAS Heteromorph Ammonite – Barremian Cretaceous, Agadir Morocco

Description

This listing features a rare and scientifically notable heteromorph ammonite fossil from the genus ACRIOCERAS, dating to the Barremian Stage of the Early Cretaceous Period. This well-preserved specimen was sourced from the Agadir region of Morocco, renowned for its marine fossil diversity and stratigraphic richness.

Taxonomic Classification:

• Order: Ammonitida
• Superfamily: Ancyloceratoidea
• Family: Acrioceratidae
• Genus: Acrioceras

Geological Context:

• Period: Cretaceous
• Stage: Barremian (~129–125 million years ago)
• Depositional Environment: Marine outer shelf conditions with fine-grained carbonate and marl sedimentation. These calm waters allowed excellent preservation of delicate ammonite shells and supported a diverse cephalopod fauna.

Morphological Features:

• Heteromorph coiling with an initial spiral section transitioning into a loosely coiled or hook-shaped shaft
• Strong ribbing and occasional tubercles, with visible suture patterns on well-preserved specimens
• Irregular geometry indicative of evolutionary adaptations for buoyancy control and ecological niche separation

Scientific Importance:

• Acrioceras is a key genus within the heteromorph ammonite radiation of the Early Cretaceous
• Its fossils serve as important biostratigraphic markers for the Barremian stage and aid in understanding evolutionary pathways of non-planispiral ammonites

Locality Information:

• Agadir, Morocco – A globally significant site for Cretaceous marine invertebrate fossils, yielding well-preserved ammonites from multiple horizons of the Early Cretaceous

Authenticity & Display:

All of our fossils are 100% Genuine Specimens and are provided with a Certificate of Authenticity. Photographs show the exact fossil you will receive. The scale cube = 1cm, and complete measurements can be seen in the listing photo.

This is a beautifully preserved and distinctive example of Acrioceras, ideal for collectors, researchers, or enthusiasts of ancient marine life and heteromorph ammonites.

Own a genuine fossil from the Early Cretaceous seas—over 125 million years old, rich in detail and geological heritage.