Ammonoids
Ammonoidea, Body Position and the Functional Morphology of Cre, Computational Paleontology, Fossil Cephalopods in Utah, Jurassic Ammonites, WMNH - Ammonites
Fossil Coleoidea
The latest in fossil Coleoidea research and theory, by Theo Engeser, Institut für Paläontologie, FU Berlin, Germany.
Fossil Nautiloidea
Extensive information about the group.