Allocrioceras from the Cenomanian (mid-Cretaceous) of the Lebanon and its bearing on the palaeobiological interpretation of heteromorphic ammonites

47 5 Thu, 01/01/2004 - 12:00 September 1093 1107 10.1111/j.0031-0239.2004.00408.x

WIPPICH, M. E., LEHMANN, J. 2004. Allocrioceras from the Cenomanian (mid-Cretaceous) of the Lebanon and its bearing on the palaeobiological interpretation of heteromorphic ammonites. Palaeontology, 47, 5, 1093–1107.

Max E. Wippich and Jens Lehmann Specimens of the mid-Cretaceous heteromorphic ammonite Allocrioceras cf. annulatum (Shumard, 1860) from the Upper Cenomanian lithographic limestones of the Lebanon provide an in situ record of aptychi and interpreted remnants of internal soft tissue and stomach content. Based on this exceptionally well-preserved material, Allocrioceras is interpreted as a pelagic, aperture-upwards drifter that probably fed on comatulid crinoids. Wiley Online Library