Callyspongia difficilis (Brøndsted, 1924) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Porifera class Demospongiae order Haplosclerida family Callyspongiidae genus Callyspongia species Callyspongia difficilis Name Synonyms Toxochalina difficilis Brøndsted, 1924 Homonyms Callyspongia difficilis (Brøndsted, 1924)