Cephalopods became dominant during the Ordovician period, represented by primitive nautiloids.
The class now contains two, only distantly related, extant subclasses: Coleoidea, which includes octopuses, squid, and cuttlefish; and Nautiloidea, represented by Nautilus and Allonautilus.
Ammonite Clymenia Large
Ammonite Clymenia Large
Clymenia Ammonite Fossil Large. Please note individual items will differ from the one photographed. Size approx 6cm.
Ammonite Clymenia Medium
Ammonite Clymenia Medium
Clymenia Ammonite Fossil Medium. Please note individual items will differ from the one photographed. Size approx 4cm.
Ammonite Clymenia Small
Ammonite Clymenia Small
Clymenia Ammonite Fossil Small. Please note individual items will differ from the one photographed. Size approx 3cm.
Goniatite Extra Large
Goniatite Extra Large
Goniatite fossil. Please note individual items will differ from photograph. Size approx. 10cm. (pictured with small size for comparison)
Goniatite Large
Goniatite Large
Goniatite fossil. Please note individual items will differ from photograph. Size approx. 8cm. (pictured with small size for comparison)
Goniatite Medium
Goniatite Medium
Goniatite fossil. Please note individual items will differ from photograph. Size approx. 6cm. (pictured with small size for comparison)
Ammonite Opalised Paired Halves Medium
Ammonite Opalised Paired Halves Medium
One pair of Opalised Ammonite halves. Albian Period NW Madagascar. Please note individual items will vary. Each half is approx. 6cm.
Ammonite Opalised Paired Halves Large
Ammonite Opalised Paired Halves Large
One pair of Opalised Ammonite halves. Albian Period NW Madagascar. Please note individual items will vary. Each half is approx. 8cm.
Ammonite Opalised Paired Halves Extra Large
Ammonite Opalised Paired Halves Extra Large
Opalised Ammonite Extra Large pair. Albian Period NW Madagascar. Please note individual items will vary. Each half is approx. 15cm.
Orthoceras Medium
Orthoceras Medium
Fossilised Orthoceras Medium. Extinct Ancestor of the Modern Squid. Individual items will vary. Size approx 6cm long.
Orthoceras Large
Orthoceras Large
Fossilised Orthoceras Large. Extinct Ancestor of the Modern Squid. Individual items will vary. Size approx 8cm long.
Orthoceras Small
Orthoceras Small
Fossilised Orthoceras Small. Extinct Ancestor of the Modern Squid. Individual items will vary. Size approx 3cm long
Orthoceras Extra Large
Orthoceras Extra Large
Fossilised Orthoceras Large. Extinct Ancestor of the Modern Squid. Individual items will vary. Size approx 10cm long.
Goniatite Discs 40mm
Goniatite Discs 40mm
Goniatite Fossil Discs. Devonian Ammonite Morocco. Please note individual items will differ from photograph. Size approximately 35 to 40mm diameter x 8mm thickness.
Ammonite Dactylioceras Species
Ammonite Dactylioceras Species
Ammonite Dactylioceras Species. Jurassic Ammonite in Posidonia Shale from Holzmaden Germany. Please note individual items will differ from the one photographed.
Orthoceras Fossil Plate 1.5kg
Orthoceras Fossil Plate 1.5kg
Fossilised Orthoceras 1.5kg Polished plate. Orthoceras ("straight horn") is a genus of extinct nautiloid cephalopod restricted to Middle Ordovician-aged marine limestones of the Baltic States and
