5″ Iridescent Placenticeras meeki Ammonite Fossils (Male & Female), Pierre Shale, Maastrichtian, Cretaceous, Meade County, South Dakota, USA

Description

This listing features a spectacular Placenticeras meeki ammonite fossil pair—both male and female specimens—preserved in stunning iridescent detail. These ammonites originate from the Maastrichtian stage of the Late Cretaceous and were discovered in the famous Pierre Shale deposits of Meade County, South Dakota, USA.

About Placenticeras meeki

Placenticeras meeki is one of the most sought-after ammonites from the Cretaceous period, known for its highly ornamented shell and striking nacreous iridescence. These ammonites thrived in ancient marine environments over 70 million years ago, making them exceptional fossils for collectors, scientists, and enthusiasts alike.

The Significance of Male and Female Specimens

This set includes both a macroconch (female) and a microconch (male), demonstrating sexual dimorphism within the species. Macroconchs are generally larger with more robust shells, while microconchs are smaller and more delicate. Having both in one collection is an extraordinary opportunity to own a complete representation of this fascinating species.

Fossil Details:

• Species: Placenticeras meeki
• Geological Age: Maastrichtian, Late Cretaceous (~70 million years old)
• Formation: Pierre Shale
• Origin: Meade County, South Dakota, USA
• Size: 5 inches (see scale for full sizing)
• Preservation: Exceptional iridescence, clear sutures, and shell detail

Why This Fossil is Special:

• Rare iridescent ammonite fossil pair (male & female)
• Exceptional preservation with natural shimmering coloration
• From a world-renowned fossil locality
• A valuable addition to any ammonite collection
• Comes from the prestigious Alice Purnell Collection, one of the largest ammonite collections in the world
• 100 percent genuine specimen with a Certificate of Authenticity

What You See is What You Get

This listing features the exact fossils shown in the photos—no stock images used.

Buy with Confidence:

• Authenticity Guaranteed – Professionally identified and verified
• Secure Packaging – Expertly packed for safe shipping
• Fast and Reliable Shipping – Worldwide shipping available

These Placenticeras meeki ammonites, displaying stunning iridescence and a rare male-female pairing, are a must-have for serious collectors. Don’t miss this opportunity to own a genuine piece of Late Cretaceous history.