Hydrococcus Dataset NCBI Taxonomy Rank GENUS Classification kingdom Metazoa phylum Mollusca class Gastropoda order Littorinimorpha family Hydrococcidae genus Hydrococcus Name Synonyms Hydrococcus Thiele, 1928 Homonyms Hydrococcus Hydrococcus Hydrococcus Thiele, 1928 Hydrococcus Kutzing 1833