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
Sister taxa: none
Type specimen: BGS GSM 104286, a shell. Its type locality is Cefn Gunthly, which is in an Abereiddian offshore shale in the Hope Shale Formation of the United Kingdom.
Ecology: fast-moving nektonic carnivore