 Three years later, Salter erroneously assigned "H. banksii" to "Pterygotus" ("Erettopterus") based on bilobed telsons of "Erettopterus spatulatus" that he misidentified as belonging to "H. banksii".In turn, the telsons of "H. banksii" were referred to "Stylonurus megalops" (now in the genus "Hardieopterus").It would not be until 1934 when Størmer classified "P. (E.) banksii" in "Hughmilleria".