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Ammonoid
Taxonomy
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Diagnostic features
[See labelled diagram above]
Aragonite shell
Septa
Suture (different for goniatites, ceratites and ammonites, see second diagram…
TF0301 Goniatite
Species
Goniaites
Stratigraphic Range
Devonian to Permian
Taxonomy
Phylum: MolluscaClass: CephalopodaSubclass: AmmonoideaOrder: Goniatitida
Distinctive Features
Planispiral shellGoniatitic suture linesInvolute
Preservation
Internal mould