Polychaeta taxon details
From editor or global species database
Taxonomy By the superficial resemblance of the fossilized siphon of Actinoceras bigsbyi, an ammonite, with the chitinous operculum of the serpulid Pomatostegus stellatus, the genus Actinoceras figured for a long time in Polychaete catalogues as a synonym of Pomatostegus. See remark Cymospira as well. [details]
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