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Calycoceras (Newboldiceras) Asiaticum Ammonite 285mm SOLD


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A superb fossilised example of a well-formed ammonite shell unearthed in the Cretaceous fossil layers of the exotic island of Madagascar, The macroconch (female of the type), exhibits well defined and intact ribbing to the umbilicus (fossil shell), and now displayed on the fine bronze mount, creating a wonderful sculptural feature.

Type: Calycoceras (Newboldiceras) asiaticum (Jimbo 1894) spinosum Kossmat 1897
Subcategory: Newboldiceras (Described by Thomel 1972)
Genus: Calycoceras (Described by Hyatt 1900)
Geological Age: Mid Cretaceous, Cenomanian stage, 96,000,000 to 92,000,000 years old)
Origin: N.E. Madagascar. E. Africa, South Indian Ocean

Ammonoid on base measurements.
Height: 28.5 cm
Width: 21 cm
Depth: 9.5 cm

Ammonoid specimen measurements.
Height: 17 cm
Width: 21 cm
Depth: 9.5 cm

On base Weight: 3,532 g

Ammonite Weight: 3,208 g

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An attractive ammonite surmounted within a bronze cradle and bronzed boxed plinth. The design process is a crucial process for each classic creation, revitalising the fascinating natural and ancient fossil shell, an extinct marine mollusc, and presenting them to the best possible advantage. The ancient member of the cephalopod group (squids, octopuses, cuttlefish and nautilus), now mounted in an accent reminiscent of Greek and Roman classical sculpture.

This subspecies is characterized by a more compressed umbilicus section than the nominal subspecies, well defined narrow ribs along with rows of strong tubercles. A mature umbilical diameter of around seventeen centimetres in the macroconch (female), with the adult size of the latter, can exceed twenty-two centimetres. The adult microconch (male) does not exceed half that size. The macroconch umbilicus is thought to be naturally larger to enable the female to hold a batch of eggs and thereafter a brood of young.

Pliny the Elder studied fossils and we at the fossil store quite understand how fascinating he found not only the natural history of these fossils, their intriguing shell forms, we can understand how the ancient Greeks and Romans discovered a familiarity with these prehistoric petrified and fossilised remains just as we still do today.

Ammonites are part of the Ammonitida of marine invertebrates. These were fascinating creatures from the deep oceans and believed to be similarly aggressive, like giant squids of today. With extremely large eyes and remarkable vision hunting down prey at great depths, where little light penetrated the ocean. The Cephalopod would grasp its prey using long tentacles, much as the modern-day Nautilus Pompilius which can still be found extant in the modern-day Pacific Ocean.