Rare Kamerunoceras isovokyense Ammonite Fossil Lower Turonian Cretaceous Menabe Madagascar Genuine Specimen

Description

Rare Kamerunoceras isovokyense Ammonite Fossil

This listing presents a rare Kamerunoceras isovokyense ammonite fossil, dating from the Lower Turonian Stage of the Cretaceous period, discovered in the fossil-rich beds of Menabe, Madagascar. This specimen is a fine representation of a classic Turonian ammonite genus, displaying the strong ribbing and sculptural form that makes Kamerunoceras one of the most recognisable ammonites of the Late Cretaceous. The photographs show the exact specimen you will receive, with a 1 cm scale cube included for reference. Every fossil we offer is a 100% genuine specimen and comes with a Certificate of Authenticity.

Geological Age and Setting

The Lower Turonian Stage, around 93.9–89.8 million years ago, marks the start of the Late Cretaceous. This was a period of global marine transgression, when high sea levels created extensive shallow seas across Africa, Europe, and Madagascar. These warm, nutrient-rich environments supported diverse ecosystems teeming with ammonites, marine reptiles, and invertebrates. The Menabe region of Madagascar is one of the world’s most famous localities for Turonian ammonites, producing beautifully preserved specimens that serve as vital references for paleontological study and as highly sought-after collector pieces.

Taxonomy and Classification

Kamerunoceras isovokyense belongs to the family Acanthoceratidae, within the superfamily Acanthoceratoidea, order Ammonitida. The Acanthoceratidae are well known for their robust shells with bold ribbing and tuberculated ornamentation, features that reflect both evolutionary adaptation and diagnostic utility for fossil identification. The genus Kamerunoceras is especially significant in Turonian stratigraphy, with isovokyense being one of the species that helps define ammonite zones within this stage, making it scientifically valuable for biostratigraphic correlation.

Morphological Features

The shell of Kamerunoceras isovokyense is evolute, with clearly visible earlier whorls and strong ribs that sweep across the flanks to the venter. Prominent tubercles or nodules often accentuate the ribs, creating a sculptured, rugged appearance typical of the genus. These features not only make the ammonite easily identifiable but also visually impressive. The ornamentation provided structural strength and may have aided hydrodynamic performance, reflecting the ammonite’s role as an active predator in the Cretaceous seas. The preservation of these morphological details in this specimen makes it both scientifically important and aesthetically desirable.

Scientific and Collector Significance

Ammonites like Kamerunoceras isovokyense are crucial for Lower Turonian biostratigraphy, serving as key index fossils. Their restricted time ranges and distinctive ornamentation allow geologists to precisely date and correlate rock layers across continents. For collectors, specimens from Madagascar are highly sought after because of their rarity, preservation quality, and classic provenance. Owning a Kamerunoceras from Menabe is not only owning a fossil but also a piece of scientific history tied to the understanding of Cretaceous oceans.

Provenance and Authenticity

This specimen originates from Menabe, Madagascar, a globally renowned fossil site. Every ammonite we sell is carefully selected and guaranteed authentic, accompanied by a Certificate of Authenticity for full confidence in its origin. Secure packaging and professional handling ensure safe delivery of this valuable specimen.

This is a rare Kamerunoceras isovokyense ammonite fossil from the Lower Turonian of Madagascar. Its striking morphology, scientific importance, and exceptional provenance make it a prized addition to any serious fossil or ammonite collection.