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Semiannuloceras Evans 2005 (mollusk)

Cephalopoda - Orthocerida - Baltoceratidae

PaleoDB taxon number: 142797

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, Castelloceras, Cochlioceras, Cyrtobaltoceras, Endorioceras, Eosomichelinoceras, Hedstroemoceras, Metabaltoceras, Microbaltoceras, Rhabdiferoceras, Sinocochleoceras, Veneficoceras

Subtaxa: Semiannuloceras abbeyense

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Type: Semiannuloceras abbeyense

Ecology: nektonic carnivore