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Ammonoidea  search
BTInvertebrata
 .Mollusca
 ..Cephalopoda
 ...Tetrabranchiata
 ....Ammonoidea
NTAmmonites
 Anarcestida
 Bactritida
 Baculites
 Bouleiceras
 Ceratitida
 Clymeniida
 Dactylioceratidae
 Desmoceratida
 Goniatitida
 Hildocerataceae
 Lytoceratida
 Perisphinctida
 Phylloceratida
 Prolecanitida
 Psiloceratida
 Scaphites