Rare Spiticeras (Kilianiceras) lamberti Ammonite Fossil Berriasian Cretaceous Lacisterne Boisset Gard France

Description

Genuine Spiticeras (Kilianiceras) lamberti Ammonite Fossil

This listing is for a rare Spiticeras (Kilianiceras) lamberti ammonite fossil, dating from the Berriasian Stage of the Early Cretaceous period. It was collected from the classic fossil-bearing site at Lacisterne, Boisset, Gard, France, a location well known for producing beautifully preserved Cretaceous ammonites. This specimen is a carefully chosen, genuine piece – the photographs show the actual fossil you will receive. All of our fossils are supplied with a Certificate of Authenticity, guaranteeing its provenance and ensuring complete buyer confidence. The cube in the photos shows 1cm squares for scale, with full measurements available in the images.

Geological Age and Formation

The fossil originates from the Berriasian Stage (approximately 145–139 million years ago), which represents the very base of the Cretaceous System. This stage directly succeeds the Tithonian of the Upper Jurassic and is a critical time interval in stratigraphy because it marks the transition between two great geological eras. The ammonite beds of Lacisterne are highly regarded for their rich faunal assemblages that allow detailed biostratigraphic correlation across Europe. Fossils from this age are particularly significant as they capture the evolutionary radiation of ammonite families that would dominate the Cretaceous seas.

Species and Classification

The specimen belongs to the genus Spiticeras, with this particular example identified as Spiticeras (Kilianiceras) lamberti, a species first formally described by renowned paleontologist Eugène Kilian. Taxonomically, the genus Spiticeras is part of the family Spiticeratidae, within the superfamily Perisphinctoidea, order Ammonitida. Members of this family are characterized by their relatively involute shells, strong ribbing, and well-defined whorls that often show a compressed but elegant morphology. This piece demonstrates these features, making it both scientifically and aesthetically valuable.

Morphological Features

Spiticeras (Kilianiceras) lamberti ammonites are noted for their distinctive ribbed ornamentation and the moderately evolute whorl structure. The ribs typically bifurcate or trifurcate as they cross the flanks and extend towards the venter, giving the shell a strikingly sculptured appearance. These morphological traits not only aided in identification but also give collectors and researchers a fascinating insight into the hydrodynamics and evolutionary adaptations of ammonites during the Early Cretaceous. The fossil on offer preserves these diagnostic features clearly, highlighting its scientific and display quality.

Scientific and Collector Significance

Ammonites such as Spiticeras lamberti are of considerable importance to paleontologists as index fossils, enabling precise dating of the Berriasian Stage. Their restricted stratigraphic ranges mean they are key tools in defining ammonite zones within the Lower Cretaceous. For collectors, specimens from Lacisterne, Gard are highly prized due to their rarity and excellent preservation. This fossil represents not only a tangible connection to the marine ecosystems of 145 million years ago but also a well-documented species with a secure place in ammonite taxonomy.

Provenance and Authenticity

Every specimen we offer is chosen with care and guaranteed to be authentic. This Spiticeras (Kilianiceras) lamberti ammonite fossil is no exception – it has been professionally identified and originates from a reputable French locality. The fossil will be shipped securely and accompanied by a Certificate of Authenticity, ensuring complete traceability and peace of mind.

This is a rare opportunity to acquire a scientifically significant ammonite fossil from the very dawn of the Cretaceous. Its rarity, provenance, and condition make it a superb addition to any collection of ammonites, Cretaceous fossils, or general paleontology specimens.