Riella cossoniana var. echinata Müll.Frib. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Marchantiophyta class Marchantiopsida order Sphaerocarpales family Riellaceae genus Riella species Riella echinata Name Homonyms Riella cossoniana var. echinata Müll.Frib.