Cephalopoda - Orthocerida - Baltoceratidae

Full reference: D. H. Evans. 2005. The Lower and Middle Ordovician cephalopod faunas of England and Wales. Monograph of the Palaeontographical Society 623:1-81

Parent taxon: Baltoceratidae according to D. H. Evans 2005

Sister taxa: Amsleroceras, Annbactroceras, Bactroceras, Cochlioceras, Cyptendoceras, Cyrtobaltoceras, Endorioceras, Eosomichelinoceras, Hedstroemoceras, Metabaltoceras, Microbaltoceras, Rhabdiferoceras, Semiannuloceras, Sinocochleoceras, Veneficoceras

Subtaxa: Castelloceras arennigense

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Type: Castelloceras arennigense

Ecology: nektonic carnivore