 Charles Doolittle Walcott found one specimen during one of his field trips to the Burgess Shale between 1910 and 1917.In the 1970s Simon Conway Morris re-examined the specimen and tentatively concluded that it was a swimming lophophorate, in other words related to the ancestors of molluscs, annelid worms and brachiopods.In 2006 Caron, Scheltema "et al."