Ferrantia, Volume 10: Epifaune et Endofaune de Liogryphea arcuata (Lamarck): Contribution à l'Ecologie des Populations de Liogryphaea arcuata (Lamarck) dans le Sinémurien au NE du Bassin de Paris

More than 2000 specimens of Liogryphaea arcuata (Lamarck), coming from four populations of the Sinemurian in lotharingian facies in the north-eastern part of the Paris Basin have been analysed as to their paleontological and paleoecological evidence.

In a first part is given a detailed description of the epifauna, such as young Oysters, Bryozoans (Stomatopora sp.), Crinoids and encrustring Sponges, as well as borings done by different organisms: boreholes made by Barnacles, filiform boring-systems of different types, boreholes due to Gastropodes, to encrusting Sponges, and finally recent and actual borings.

In a second part the author tries to reconstruct the biological and the sedimentological environment of the different populations, whilst, in a last chapter, he examines the presumed live-position of Liogryphaea arcuata (Lamarck) in connection with the epifauna and the endofauna.