? umbonata Wallr. Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Plantae phylum Marchantiophyta class Marchantiopsida order Marchantiales family Aytoniaceae genus Asterella species Asterella saccata Name Homonyms ? umbonata Muir-Wood & Cooper, 1960 ? umbonata Billings, 1862 ? umbonata Ulrich, 1894