Arietitidae Collection

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

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

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

Ammonite selection
Three ammonites as follows: (Left to right) Oistoceras wrighti; Asteroceras obtusum (zonal index species); Tragophylloceras loscombi all specimens originate from the Jurassic rocks near Lyme Regis

Asteroceras obtusum, ammonite
Shown here is a Jurassic ammonite. Ammonites are an extinct group of fossil cephalopods related to todays Nautilus

Asteroceras marstonensis and Promicroceras, ammonites

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