In the Daonella Limestone fossils occur in both limestones and marly interbeds. The distinct ammonoid bearing horizons allow a quite good timing of the section. At the base of the second limestone interval of the Daonella Shales a rich ammonoid fauna can be referred to the Meginae Zone on the basis of Meginoceras , Protrachyceras and Anolcites . As the specimen is just a body chamber fragment it may belong either to a new genus or to a new species of the genus Frankites . If not condensed, the fauna could represent either the top of the Archelaus Zone s.l.
Further collections are clearly necessary for a definite solution.
The specimen shows the typical ventral morphology of Trachyceras , but the definite attribution is not sure because the specimen is a body chamber and misses the suture line. Above this level D. indica and D. lommeli are very common. Especially D. lommeli shows a very long range, from the lower part of the Daonella Shales up into the Daonella Limestone. In general D. indica is less frequent than D. lommeli . From the levels VT36 to VT 46 the bivalves show some modifications with respect to the typical D. lommeli morphology.