Apjohnia tropica P.L.Crouan & H.M.Crouan Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Chlorophyta class Ulvophyceae order Siphonocladales family Siphonocladaceae genus Siphonocladus species Siphonocladus tropicus Name Homonyms Apjohnia tropica P.L.Crouan & H.M.Crouan