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Polycyphus
Taxonomy
Polycyphus was named by Agassiz and Desor (1846) [Sepkoski's age data: J Bath J Oxfo].
It was assigned to Stomechinidae by Fell and Pawson (1966); and to Phymosomatoida by Sepkoski (2002).
It was assigned to Stomechinidae by Fell and Pawson (1966); and to Phymosomatoida by Sepkoski (2002).