Petalonema crustaceum Dataset NCBI Taxonomy Rank SPECIES Classification phylum Cyanobacteriota class Cyanophyceae order Nostocales family Scytonemataceae genus Petalonema species Petalonema crustaceum Name Synonyms Petalonema crustaceum Agardh ex Kirchner 1900 Homonyms Petalonema crustaceum Petalonema crustaceum Agardh ex Kirchner 1900