Acaulon triquetrum (Spruce) C.Muell. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Bryophyta class Bryopsida order Pottiales family Pottiaceae genus Acaulon species Acaulon triquetrum Name Homonyms Acaulon triquetrum (Spruce) C.Muell. Acaulon triquetrum (Spruce) Müll.Hal.