? exserta Sardeson, 1892 Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Animalia phylum Mollusca class Monoplacophora order Tryblidiida family Tryblidiidae Name Homonyms ? exserta Thomson, 1895 ? exserta Sun, 1983 ? exserta Gregory, 1900 ? exserta Sardeson, 1892 ? exserta Laseron, 1918