Protoginkgoxylon Khudayberdyev, 1971 Dataset GBIF Backbone Taxonomy Rank GENUS Classification kingdom Plantae phylum Tracheophyta genus Protoginkgoxylon Name Homonyms Protoginkgoxylon R.C.Chudajberdyev, 1971 Protoginkgoxylon Khudayberdyev, 1971