lophotrochozoan mollusk http://id.loc.gov/authorities/subjects/sh85086611 http://purl.bioontology.org/ontology/MESH/D008974 http://purl.bioontology.org/ontology/NCBITAXON/6447 http://purl.bioontology.org/ontology/SNOMEDCT/106877009 http://purl.bioontology.org/ontology/SNOMEDCT/770326002 https://en.wikipedia.org/wiki/Category:Molluscs https://en.wikipedia.org/wiki/Mollusca https://www.wikidata.org/wiki/Q25326 Any of various members of the second-largest phylum of invertebrate animals after the Arthropoda. The members are known as molluscs or mollusks. Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. The proportion of undescribed species is very high. Many taxa remain poorly studied. Mollusca SB998.M64 QL401-QL432 mollusc mollusks