 It was later suggested by Reginald Pocock in 1913 that the two species, "G. carbonarius" and "G. scudderi" were indeed the same, and this has resulted in confusion over both the name to be used and number of species present in North America.Graeophonus anglicus has been found in the English Middle Coal Measures of Coseley, Staffordshire.Known from ten specimens that are now deposited in the British Museum, the species was named by Reginald Pocock in 1911.