Protereisma permianum Sellards, 1907 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Arthropoda class Insecta order Ephemeroptera family Protereismatidae genus Protereisma species Protereisma permianum Name Synonyms Mecus gracilis (Sellards, 1907) Prodromus rectus Sellards, 1907 Protechma acuminatum Sellards, 1907 Protereisma gracile (Sellards, 1907) Protereisma minus Sellards, 1907 Scopus gracilis (Sellards, 1907) Homonyms Protereisma permianum Sellards, 1907