Ahbach FormationThe Ahbach Formation is a geologic formation in Germany. It preserves fossils dating back to the Middle Devonian period.Fossil contentThe formation has provided among others the following fossils:Alveolites intermixtusAulopora serpensFavosites saginatusHeliolites porosusPachytheca stellimicansPlatyaxum (Platyaxum) escharoidesPlatyaxum (Egosiella) clathratumPseudopalaeoporella lummatonensisThamnophyllum caespitosumThamnopora nicholsoniThamnopora cf. dubiaCupressocrinites sp.Girvanella sp.Resteignella sp.Sphaerocodium sp.?Couvinianella sp. Trilobita indet.