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Showing results for tags 'kimmeridian'.
Found 4 results
Pliosaur posted a gallery image in Members Gallery
Crussoliceras ammonites ID
RuMert posted a topic in Fossil IDI once stumbled on a group of small kimmeridgian ammos which were all later IDed as Crussoliceras spp. The genus is very rare and poorly known here. Do you have any suggestions about species? Thanks @Ludwigia
Taramelliceras (Taramelliceras) compsum (Oppel 1863)
Ludwigia posted a fossil in AmmonoidsLimestone mold of the phragmocone.
Crussoliceras divisum (Quenstedt 1888)
Ludwigia posted a fossil in AmmonoidsCalcite mold with a fine residue of green glauconite on the phragmocone. This is the index fossil for the divisum zone. C. divisum is generally larger than C. crusoliense, which reaches an adult diameter of at the most 15 cm. The bipartite ribs crossing the venter continue mostly on until the end of the bodychamber and can become irregular, whereas by C. crusoliense they tend to merge towards the end and remain relatively constant.