''Sicyophorus'' is a genus of

archaeopriapulid Archaeopriapulida is a group of priapulid-like worms known from Cambrian lagerstätte. The group is closely related to, and very similar to, the modern Priapulids. It is unclear whether it is mono- or polyphyletic. Despite a remarkable morphol ...

known from the

Chengjiang biota The Maotianshan Shales are a series of Early Cambrian deposits in the Chiungchussu Formation, famous for their '' Konservat Lagerstätten'', deposits known for the exceptional preservation of fossilized organisms or traces. The Maotianshan Shales ...

; synonymous with ''Protopriapulites haikouensis''.

References

Priapulida Prehistoric protostome genera Cambrian genus extinctions {{Cambrian-animal-stub