Zoom Ancyloceras Heteromorph Ammonite 545mm
Zoom Ancyloceras Heteromorph Ammonite 545mm
Zoom Ancyloceras Heteromorph Ammonite 545mm
Zoom Ancyloceras Heteromorph Ammonite 545mm
Zoom Ancyloceras Heteromorph Ammonite 545mm
Zoom Ancyloceras Heteromorph Ammonite 545mm
Zoom Ancyloceras Heteromorph Ammonite 545mm

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Ancyloceras Heteromorph Ammonite 1.8ft

£1,192.00 GBP

The strangely weird-looking heteromorph fossilised shell of this type of ancient mollusc is not so instantly recognisable as part of the suborders of ammonoidea, ammonites. The eccentrically winding growth of the shell appears quite exotic. Up until quite recently, it was thought that the evolving form was a period of decline during the Jurassic when this type of dimorphism first appeared in the fossil record of ammonoidea. For the ammonites, the evolution of the heteromorph uncoiling whorls persisted up to their eventual extinction in the later Cretaceous period.


Now it established that in fact, this was radiation of types of heteromorphs which were developing and evolving a greater diversity rather than a declining last act of the ammonite group. This coincided with the great extinction at the KT boundary. The eccentric fossilised shell, termed an internal mould, is from around 100 million years ago. Excavated from the High Atlas mountains of Morocco, the western province of Agadir-Ida Ou Tanane Prefecture and of the Souss-Massa, Marrakech-Safi region.


The specimen fossil is now surmounted with bronze, this balances the fossils securely, which can be lifted off the stand for transport and further study. This bronze mount forms part of our classic millennium range of fossils. To see more classic fossil bronze mounting visit our interiors section from the menu bar at the top of this page.


Early forms of Jurassic heteromorph ammonites had morphology which was not as exaggerated as this specimen, in their early development the last outer whorl of the shell became separate from the main inner spirals, this developed becoming more pronounced as in this example, eventually towards the end of the Cretaceous types were developing complex and convoluted intertwined types. A most fascinating glimpse back in time to a period of great expansion which finally and abruptly ceased in one of the largest extinctions known to man.


Ancyloceras Heteromorph ammonite bronze mount, the clasps do not harm the specimen, which supports the ammonite in an upright position for a dramatic and attractive display. The bronze mounts very attractive to gallery or museum exhibition standard. The specimen fossil may be lifted off the bronze base easily for study and safe transportation.


Geological age: Lower Aptian - Upper Albian 113 to 108 million years.
Genus Att: Audoulioceras, Ancyloceras cf. matheronianum (D’Orbigny 1842)
Location: Pays de Haha, Essaouira south to the Souss Valley, Western Morocco High Atlas Range.


Heteromorph measurements in bronze mount.
Height: 54.5 cm
Width: 21.0 cm
Depth: 8.0 cm


Heteromorph sp. measurements.
Height: 45.0 cm
Width: 26.0 cm
Depth: 9.0 cm


Base measurements.
Height: 4.0 cm
Width: 1.75 cm
Depth: 10.5 cm


Approximate weight: 8 Kg

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Please note, for UK orders - small products usually arrive within 3 - 5 business days.
Large products usually arrive within 4 - 10 business days, this may vary if your item/s require special packaging requirements based on size and to improve the safety of your item/s. For deliveries outside of the UK, please see our Delivery and Returns.

✓ Free UK Delivery

✓ Free standard UK delivery - Recorded/Signed-for

All UK orders include free delivery, excluding Ireland, Scotland and the Highlands.

✓ Worldwide Delivery

✓ Worldwide delivery - Tracked/Signed-for

All orders outside the United Kingdom are tracked for you to follow. Please contact us and include your delivery address, including the item/s of interest for delivery estimates.

✓ Authenticity Guaranteed

✓ Certificate of authenticity included


You will receive a certified certificate signed on behalf of The Fossil Store. We only provide authentic, high quality assured fossil and mineral specimens.

✓ Specify Delivery Date

✓ Specify Delivery Date - contact us with your preferred delivery date to see if we can accommodate you. You can do this here on our Contact Form.

We shall accommodate you where possible - certain products require longer leading times to delivery due to custom packaging , bespoke crate and pallet builds to guarantee a secure delivery.

If available, will offer the option to select a day and a one-hour time slot depending on availability - your oder will be assigned to DPD Precise or to an alternate courier once your order is confirmed through our checkout.

For Next-Day delivery, Please contact us before 11:00AM - availability is limited to processing times and time of enquiry.

For more information on Returns please see our Returns Policy. Some Exclusions Apply. Learn more about Thefossilstore.com delivery options and Returns Policy.

Please note, for UK orders - small products usually arrive within 3 - 5 business days.
Large products usually arrive within 4 - 10 business days, this may vary if your item/s require special packaging requirements based on size and to improve the safety of your item/s. For deliveries outside of the UK, please see our Delivery and Returns.

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