摘要
In the greenhouse world of the Early UpperCretaceous of Europe giant cephalopod shells of thehemibenthic ammonite Puzosia formed hugeaccumulations.Their shells indicate adaptations in thebody chamber morphology depending on theenvironment.On the sea floor,deposited ammonite shellsscoured up to 50 cm depth which caught more and morelarge shells over extended periods of time.They built upto five square meter extended scour troughs in which theshells are enriched in chain-,fan-and fan layer orderswith a maximum accumulation of 24 cephalopods.Between these hundreds of other macrofaunal remainsaccumulated.The ammonite shells were benthic islandsand minibiotopes in carbonate soft-to firm groundenvironments along a submarine swell in the southernNorth Sea Basin of Central Europe.The empty shellsencrusted by different epizoans sheltered and protectedalso crustaceans,which undermined the empty shells bybioturbation.Small and extremely rare squamate reptilesof the marine Dolichosaurus longicollis possibly tookshelter or fed within these unique benthic submarinedepression“islands”.
基金
supported by grants, between 1994-2001,from the Deutsche Forschungsgesellschaft (DFG Str.98/3)
the LandNorth-Rhine Westphalia (City Halle/Westph.)
the LandkreisOsnabrück, the Bezirksregierung Detmold, the NaturparkvereinNördlicher Teutoburger Wald-Wiehengebirge e.V.
the HeimatvereinBorgholzhausen e. V.
the Naturkundemuseum Bielefeld.
