Description
Genuine Arkadioceras Ammonite Fossil
This genuine ammonite fossil is identified as Arkadioceras sp. and comes from Kima in Lamu County, Kenya. It is recorded from Bajocian Jurassic rocks and is a carefully selected African specimen with valuable genus, age, and locality information. The photographs show the exact fossil offered for sale, so the ammonite pictured is the specimen you will receive.
The abbreviation “sp.” indicates that the fossil is confidently identified to the genus Arkadioceras without assigning it to a particular species. This is a standard and careful palaeontological notation, used when the preserved features support a generic identification but do not justify a more precise species name. The genus-level identification still gives the specimen meaningful scientific context.
Bajocian Geological Context
The Bajocian represents a recognised stage of Jurassic geological time. During this interval, marine environments supported diverse ammonite communities and other sea life. Shells could settle on the sea floor after death and become buried within sediment. Compaction, mineralisation, and geological change then preserved some examples as fossils.
Ammonites evolved rapidly and were widely distributed through ancient seas. Their changing shell forms make them particularly useful to geologists for comparing sedimentary sequences and establishing relative ages. The documented Bajocian context gives this specimen a clear position within the Jurassic succession.
Kima and Lamu County, Kenya
Kima is recorded within Lamu County on the Kenyan coast. Fossils with documented locality information carry more context than unlocalised examples because their place of origin connects them to a specific regional geological record. An ammonite from Kenya also adds important geographical variety to a collection often dominated by European material.
The coastal region of East Africa contains sedimentary rocks associated with ancient marine environments. Sediment deposited in those settings protected shells and contributed to their fossilisation. The specimen’s natural matrix, colour, mineral texture, small breaks, and differences in surface preservation reflect its long geological history.
Shell Form and Collectable Detail
Arkadioceras ammonites are studied through their coiling, whorl proportions, ribbing, and shell ornamentation. Examine the photographs for the visible whorls, shell outline, growth features, and natural matrix preserved on this individual specimen. These details provide the clearest evidence of its condition and morphology.
The original shell was divided into chambers. The living animal occupied the final body chamber, while older sealed chambers contributed to buoyancy control. Ammonites were relatives of living squid, cuttlefish, and nautiluses, although they belonged to their own extinct branch of cephalopods.
Every fossil preserves a different balance of shell and surrounding rock. The multiple photographs provide useful views of the exact specimen and show its proportions and natural character more clearly than a generic description.
Exact Specimen and Full Sizing
Full sizing is shown in the photographs, which provide the best scale information for this individual fossil. The images are not stock photographs and do not represent a similar piece. They show the exact Arkadioceras sp. ammonite that will be supplied.
Authenticity and Presentation
This is a genuine fossil specimen and includes a generic Certificate of Authenticity card with a lifetime guarantee. It has been carefully chosen for its identifiable ammonite form, Bajocian context, Kenyan provenance, and natural geological character. It makes a distinctive addition to a cabinet collection, educational display, office, study, or gift for anyone interested in authentic Jurassic fossils, African geology, and prehistoric marine life.
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