Zur paläobathymetrischen zuverlässigkeit von ammonoideen-faunen-spektren

The Jurassic ammonoid faunal spectrum of the Mediterranean faunal provinces always exhibits a large quota of Phylloceratina and Lytoceratina. As a rule, these ammonites are supposed to be index fossils of deeper-water deposits. An example from Spain suggests that this is not always the case. Nevertheless general zoogeographical aspects of ammonoid distribution, irrespective of the depth of water, still merit our attention.