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

Description

Rare Kamerunoceras antsaronense Ammonite Fossil

This listing presents a rare Kamerunoceras antsaronense ammonite fossil, dating from the Lower Turonian Stage of the Cretaceous period, collected in the highly fossiliferous beds of Menabe, Madagascar. This specimen represents one of the classic ammonite genera of the Turonian seas, renowned for their striking ribbed shells and distinctive tuberculation. The fossil shown in the photographs is the exact specimen you will receive, with a 1 cm scale cube provided for accurate sizing. Every fossil we supply is a 100% genuine specimen and comes complete with a Certificate of Authenticity.

Geological Age and Setting

The Lower Turonian Stage (approximately 93.9–89.8 million years ago) marks the start of the Late Cretaceous, a time of widespread shallow seas and high marine biodiversity. During this stage, ammonites were particularly abundant and diverse, adapting to a wide range of ecological niches. The Menabe region of Madagascar is a world-renowned fossil site that has produced some of the finest ammonite specimens known, with preservation that captures the detailed morphology of these marine cephalopods. Fossils from Menabe are scientifically significant, providing key material for the study of ammonite evolution and stratigraphy.

Taxonomy and Classification

Kamerunoceras antsaronense is a species within the genus Kamerunoceras, belonging to the family Acanthoceratidae, superfamily Acanthoceratoidea, and order Ammonitida. The Acanthoceratidae are among the most iconic ammonites of the Turonian, instantly recognizable by their robust shells, bold ribbing, and frequent development of tubercles or nodes along the ribs. The genus Kamerunoceras is important in Cretaceous paleontology because of its role as a stratigraphic marker, with species like antsaronense used to define ammonite zones that help geologists correlate marine deposits across different regions.

Morphology and Distinctive Features

The shell of Kamerunoceras antsaronense is evolute, meaning that earlier whorls are clearly visible, and it displays strong ribs radiating from the umbilicus to the venter. Prominent tubercles often accentuate these ribs, creating a rugged, sculptural appearance. These morphological features are highly diagnostic for the species and contribute to both its scientific and aesthetic appeal. The ribbing and nodosity also provided structural reinforcement for the shell, a useful adaptation for survival in the dynamic marine environments of the Turonian seas. This specimen preserves these traits with clarity, making it a fine example of the species.

Scientific and Collector Importance

Ammonites such as Kamerunoceras antsaronense are vital for Lower Turonian biostratigraphy, acting as index fossils that allow precise dating and correlation of rock layers. Their restricted time range and well-defined morphological features make them particularly valuable to paleontologists. For collectors, specimens from Madagascar stand out due to their exceptional preservation and classic provenance. A Kamerunoceras from Menabe is not only a scientifically important fossil but also a visually striking piece of natural history that enhances any collection.

Provenance and Authenticity

This ammonite comes from the Menabe region of Madagascar, one of the premier fossil localities for Turonian ammonites. Each specimen is carefully selected for authenticity and preservation, and every fossil we offer is supplied with a Certificate of Authenticity. Secure packaging and professional handling ensure safe delivery so you can enjoy this fossil with complete confidence.

This is a rare Kamerunoceras antsaronense ammonite fossil from the Lower Turonian of Madagascar, combining scientific value, rarity, and striking morphology. It is an outstanding addition to any ammonite, Cretaceous, or general fossil collection.