Ammonoid Collection

Extinct marine reptiles
Sheet 1 of a series of posters called Extinct Animals by Benjamin Waterhouse Hawkins c. 1862. This collection of marine reptiles lived during the Jurassic period between 200

Asteroceras, fossil ammonite
A 16 cm diameter specimen of the Jurassic ammonite Asteroceras from the Lower Jurassic of Dorset, England

Ammonite fossil C016 / 5777
Ammonite (Parkinsonia dorsetensis) fossil. This ammonite has an evolute shell and is displaying complex suture lines. Specimen originates from the Middle Jurassic

Remains of the ammonites on the ledges in Kimmeridge Bay, Dorset, UK

Goniatites in sea

Cretaceous chalk seafloor
An artists impression of a Cretaceous (144 to 65 million years ago) hard chalk seafloor, where an ammonite floats above crinoids, sea urchins, brachiopods, molluscs, and a lobster

Plesiosaurus, Telesaurus, Ichthyosaurus, Pentacrinites, Ammo
Sheet 1 of a series of posters called Extinct Animals by Benjamin Waterhouse Hawkins c. 1862. This collection of marine reptiles lived during the Jurassic period between 200 and 145 million years ago

Nipponites mirabilis, ammonite
This ammonite from the Upper Cretaceous of Japan displays a loose, tangled coil

Chalk sea diorama
Diorama of Cretaceous (144 to 65 million years ago) sea floor chalk deposits, and various cephalopods

Soliclymenia ammonoid fossilised in rock, late Devonian period

Rasenia uralensi, ammonite
A fossil ammonite from the Upper Jurassic, Kimmeridge clay, Market Rasen, Lincolnshire. An ammonite has a coiled, chambered shell and is an extinct mollusc

Fossils of extinct cephalopods and ammonoids.. Handcolored lithograph from Dr. F.A. Schmidts Petrefactenbuch, published in Stuttgart, Germany, 1855 by Verlag von Krais & Hoffmann. Dr

Amaltheus stokesi (Ammonite) shell, Jurassic era

Australiceras jacki (Ammonite) shell, Cretaceous era

Placenticeras meekei (Ammonite) shell showing whorl profile, Cretaceous era

Pachydiscus (Ammonite) shell fossilised in limestone, Cretaceous era

Merocanites compressus (Goniatite) shell, Carboniferous era

Harpoceras falciferum (Ammonite) shell, Jurassic era

Baculites (Ammonite) shells, Cretaceous era

Fossils, Goniatites, illustration
Illustration of fossil Goniatites

Ammonite fossils C016 / 6000
Ammonite fossils. At left is an Aulacosphinctoides infundibulus ammonite that dates to the Lower Tithonian, and was found in Middle Spiti Shales, Niti Pass, Himalayas, Nepal

Ammonite fossils C016 / 5969
Ammonites fossils. Rock containing numerous Asteroceras sp. and Promicroceras sp. ammonites. Natural History Museum, London, UK

Snakestone ammonite C016 / 5999
Snakestone ammonite (Hildoceras bifrons) from the Jurassic Lias rocks of Yorkshire, UK. Natural History Museum, London, UK

Fossil ammonite C016 / 6079
Fossil ammonite (Hoplites sp.). This is a stongly-ribbed Cretaceous ammonite. This 7.8 centimetre wide specimen is from was found in Southern England. Natural History Museum, London, UK

Ammonite fossil C016 / 5776
Ammonite (Aulacostephanus autissiodorensis) ammonite. This is an Upper Jurassic macroconch (larger form) ammonite. Despite some damage to the shell, the fine ribbing is still apparent

Ammonite fossil C016 / 5775
Ammonite (Aulacostephanus autissiodorensis) fossil. This is an Upper Jurassic microconch (small form) ammonite with lappets on the heavily ribbed shell

Nipponites, ammonoid fossil C016 / 4897
Nipponites, uncoiled ammonoid fossil. Ammonoids are an extinct group of marine fossil cephalopods related to todays Nautilus

Ammonite fossils C016 / 4870
Ammonite fossils. Ammonites, now extinct, were marine invertebrate molluscs with a spiral shell, most less than 20 centimetres across

Ammonite fossils, 18th century C013 / 7817
Ammonite fossils. 18th-century artwork of eleven ammonite and ammonoid fossil specimens. Engraving from The natural history of Northamptonshire (1712)

Maorites ammonite fossil C013 / 6619
Maorites densicostatus ammonite fossil. Ammonites were marine invertebrates. They first appeared in the fossil record around 400 million years ago in the late Silurian and early Devonian periods

Psiloceras planorbis, nacreous ammonite
These specimens of Psiloceras planorbis are Britains earliest ammonites. Part of the William Smith collection

Brasilia bradfordensis, ammonite
This Middle Jurassic ammonite has been sectioned to show its chambers with calcite crystals formed in some and hardened mud in others. The body chamber is missing

Parkinsonia dorsetensis, ammonite
This ammonite has an evolute shell and is displaying complex suture lines. Specimen originates from the Middle Jurassic

Aegocrioceras quadratus, ammonite
This Lower Cretaceous crytocone ammonite displays whorls which do not touch each other but form an open spiral

Ichthyosaurus, Rhamphorhynchus, Plesiosaurus, Megalosaurus
Plate 82 Life on Jurassic Shores 165 Million Years Ago an illustration from Britain Before Man by F.W. Dunning et al (1978)

Plate 42 from Mineralogie Volume 1 (1790)
Coupe de la corne d ammons don?t chacunes des cazes, renferme une variete particuliere du Spath calcaire. From Recuille complet de Mineralogie? vol.1 (1790) by F.L. Swebach Desfontaines

Oxynoticeras oxynotum, ammonite
Shown here is the ventral view of this Lower Jurassic oxycone ammonite

Aulacostephanus autissiodorensis, ammonite
Shown here is an Upper Jurassic macroconch (larger form) ammonite. Despite some damage to the shell, the fine ribbing is still apparent

Dactylioceras commune, ammonite
This shows a Lower Jurassic snakestone from Whitby, Yorkshire, UK where a snakes head has been carved onto the ammonite

Dactylioceras commune, snakestone ammonite
Snakestone ammonite (Dactylioceras commune) (J. Sowerby) a lectotype specimen from Toarcian, Upper Liassic, Bifrons Zone, Whitby, U.k

Concretions with ammonites (saligrams)

Goniatites, fossil ammonite
In marked contrast to Dactylioceras, this Carboniferous Goniatites has a shell in which successive whols overlap stongly, giving a narrow, deep umbilicus

Wasatchites tridentinus, ammonoid
An extinct, marine fossil invertebrate with a heavily ribbed, coiled shell from the class Cephalopoda belonging in the phylum Mollusca (molluscs). Photographed by Beatriz Aguirre-Urreta

Gonioclymenia laevigata, ammonoid
An extinct, marine fossil invertebrate from the class Cephalopoda belonging in the phylum Mollusca (molluscs). Photographed by Beatriz Aguirre-Urreta

Dactylioceras, fossil ammonite
Dactylioceras, represented here by a 9.5 cm wide individual, is a characteristic and abundant ammonite in the Lower Jurassic of north Yorkshire, England

Prolecanites compressus, goniatite

Kosmoclymenia undulata, ammonoid
An extinct, marine fossil invertebrate from the class Cephalopoda belonging in the phylum Mollusca (molluscs). Photographed by Beatriz Aguirre-Urreta

Perisphinctes, ammonite
A Pyritised (golden cloured) ammonite from the Jurassic, Callovian, Jason Beds; Uetzing, Germany

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"Exploring the Enigmatic Ammonoid: Unveiling the Mysteries of Extinct Marine Reptiles" Delving into the depths of ancient oceans, we encounter the fascinating world of ammonoids. These extinct marine reptiles, like Asteroceras and Rasenia uralensi, once roamed our planet millions of years ago. Their legacy lives on through remarkable fossils such as Ammonite fossil C016 / 5777, which offer a glimpse into their prehistoric existence. In Kimmeridge Bay, Dorset, UK, remnants of these enigmatic creatures can still be found adorning ledges. The sight is awe-inspiring; it transports us back in time to when ammonites thrived in abundance amidst a vibrant ecosystem. Fossils of cephalopods and ammonoids provide further evidence of their presence throughout history. One particularly striking example is Dactylioceras commune - a snakestone ammonite that captivates with its intricate spiral pattern. Its preservation within Cretaceous chalk seafloor showcases nature's artistry frozen in time. Amidst this primordial seascape existed an array of other mesmerizing species including Plesiosaurus, Telesaurus, Ichthyosaurus, Pentacrinites - all coexisting alongside Ammo and Goniatites. Together they formed an interconnected web of life within these ancient waters. Nipponites mirabilis stands out among its counterparts with its unique shell structure and captivating beauty. This particular ammonite has left an indelible mark on paleontological records for generations to come. Imagine stepping into a chalk sea diorama where you witness firsthand the majesty and diversity that once flourished beneath the waves. It's here that we truly appreciate the significance and wonder surrounding these extraordinary creatures from Earth's past. As we explore further into their mysterious realm, each discovery unravels more secrets about their biology and evolution.