Traits taxon details
original description
Evans, D. H. (2005). The Lower and Middle Ordovician cephalopod faunas of England and Wales. <em>Monographs of the Palaeontographical Society.</em> 158(623): 1-77., available online at https://doi.org/10.1080/25761900.2022.12131803 page(s): 53 [details] Available for editors 
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