 It was discovered in 2004, and is known from a single specimen from Stonehaven, Aberdeenshire, Scotland.The fossil of "P. newmani" was found by Mike Newman, a bus driver and amateur palaeontologist from Aberdeen, in a layer of sandstone rocks on the foreshore of Cowie, near Stonehaven.The species was later given the specific epithet ""newmani"" in honour of Newman.