 The genus Mythicomyces was circumscribed in 1986 by mycologists Scott Redhead and Alexander H. Smith to contain the species originally named Agaricus corneipes by Elias Magnus Fries in 1861 . Fries described the species from collections made in a fir forest near Alsike , Sweden ; it was subsequently recorded in North America ( northwestern USA ) by Andrew Price Morgan in 1907 , and several times by Smith . When listing the synonyms of the species , Redhead and Smith cited the publication year of Fries 's work as 1863 instead of the correct 1861 , which rendered their new combination invalid according to the rules of International Code of Botanical Nomenclature , although the generic name was valid . The binomial was subsequently published validly in 2011 . 
