Dioon holmgrenii DeLuca et al. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Cycadopsida order Cycadales family Zamiaceae genus Dioon species Dioon holmgrenii Name Homonyms Dioon holmgrenii De Luca, Sabato & Vázq.Torres Dioon holmgrenii DeLuca et al.