Ammonitida Collection

Ammonitida or extinct fossil ammonites: Cardioceras cordatum 1, 2, Schloenbachia varians 3, 4, Ptychites opulentus 5, 6, Douvilleiceras mammillatum 7, Puzosia planulatus 8

Ammonites, extinct group of marine animals belonging to the cephalopod subclass Ammonoidea

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

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

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

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

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

Maorites densicostatus, ammonite
This flat-shelled ammonite dates from the Lower to Middle Campanian of the Upper Cretaceous, Vega Island, Graham Land, Antarctica

Ammonite, scaphites nodosus
A Cretaceous ammonite from Badlands, South Dakota, USA. This specimen retains much of its original shell giving it a beautiful pearly lustre

Promicroceras planicost, jurassic ammonites
A rock specimen containing many Promicroceras a small shelled Jurassic ammonites. Ammonites are an extinct group of marine fossil cephalopods related to todays Nautilus

Ceratites nodosus, ammonoid
The Ammonoids are an extinct group of marine fossil cephalopods related to todays Nautilus. In this specimen, the shell suture lines are clearly visible

Stephanoceras humphriesianum, ammonite
This fossil cephalopod originates from the Inferior Oolite, Middle Jurassic rocks near Sherbourne, Dorset dating from about 170 million years ago

Kosmoceras acutistriatum, ammonite
This Jurassic ammonite from Wiltshire, England occurs in a fine-grained shale, but has been severely flattened. However, the original lustre of the shell has been retained

Ammonite marble
Asteroceras (large shells) and Promicroceras (small shells) ammonites, seen here in the polished surface of a specimen of marble originating from the Lower Lias, near Yeovil, Somerset

Asteroceras and promicroceras, ammonites
A rock specimen containing Asteroceras (large shell) and Promicroceras (small shell) ammonites from the Lower Lias, Marston Magna, near Yeovil, Somerset

Nipponites, uncoiled ammonoid
An uncoiled Nipponite ammonoid fossil. Ammonoids are an extinct group of marine fossil cephalopods related to todays Nautilus

Gastrioceras, goniatite
Gastrioceras, a Carboniferous goniatite. Goniatites were highly mobile creatures similar to octopus and squid, but were protected by a coiled shell divided up into many chambers

Hildoceras bifrons, snakestone ammonite
A snakestone ammonite (Hildoceras bifrons) from the Jurassic Lias rocks of Yorkshire, U.K

A fossil Kosmoceras, ammonite
Kosmoceras, a genus of ammonite which lived during the Jurassic period

Goniatites sp. goniatite
An extinct, marine fossil goniatite from the class Cephalopoda belonging in the phylum Mollusca (molluscs), sub-class Ammonoidea. Photographed by Beatriz Aguirre-Urreta

Scaphites nodosus, ammonite
This Cretaceous ammonite originates from The Badlands, South Dakota, U.S.A. This specimen retains much of its original shell giving it a beautiful pearly lustre

Fossil ammonites used as memorial stone
Asteroceras marstonense (larger ammonites) and Promicroceras marstonensis (smaller ammonites) used as a memorial stone. Specimen originates from Spath Lower Lias, Marston Magna, Somerset, England

Asteroceras marstonensis and Promicroceras, ammonites

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