Central Taxonomic Thesaurus

Taxon Search
  Animalia
      Mollusca
            Cephalopoda
                    Ammonoidea
                          Turrilitaceae
                            Diplomoceratidae
                                     Oxybeloceras
                                             Oxybeloceras crassum
                                                   [Ptychoceras crassum]
                                             Oxybeloceras mortoni
                                                   [Ptychoceras mortoni]
                                     Solenoceras