I have three different Trigonia species to show you today, all from France and sent to me by my friend Gery.
First up is this Trigonia clavellata from the Jurassic (Oxfordian stage) cliffs near Villers sur Mer. Compare this specimen to a previously posted specimen HERE.
Also from Villers sur Mer is this single left valve of Trigonia reticulata
Lastly is Linotrigonia fittoni (Cretaceous, Albian stage) from near Courcelles
Thanks to Gery for sending me these fossils!