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Genre: Hecticoceras (Orbignyceras)
étage: Lutétien supérieur
Genus: Obornella
species: undulatum
Genre: Corylus
Aptychus / Lamellatpychus wirbel Genre: Hecticoceras (Orbignyceras)This is an aptychus; they come in pairs and are used by ammonites to seal themselves inside their shells. Genus: Lamellaptychus species: didayi Stage: Valanginian (Cretaceous) Origin: Drme, France It measures approximately 20mm, which is quite large, as the usual dimensions are more around 10 to 15mm. B6
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