? rugosum Schmidt, 1870 Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Animalia phylum Porifera class Demospongiae order Axinellida family Raspailiidae genus Ceratopsion species Ceratopsion rugosum Name Homonyms ? rugosum Billings, 1857 ? rugosum Smith, 1817 ? rugosum Sandberger & Sandberger, 1851