Priscansermarinus barnetti is an organism known from the Middle Cambrian Burgess Shale which was originally interpreted as a species of lepadomorph barnacle.

[1][2] Four specimens of P. barnetti are known from the Greater Phyllopod bed.

[3] A reflective area originally interpreted as external plates has been reinterpreted as a more complex structure inside the body; Derek Briggs, a leading authority on the arthropods of the Burgess Shale, has questioned its assignment as a barnacle or even an arthropod.

[4] The World Register of Marine Species places Priscansermarinus in Multicrustacea without assigning a class or order.

This prehistoric crustacean-related article is a stub.