What is Calliostoma?
{{italic title}} {{Taxobox | image = Calliostoma selectum.JPG | image_caption = The shell of ''[[Calliostoma selectum]]'' | regnum = [[Animal]]ia | phylum = [[Mollusca]] | classis = [[Gastropoda]] | subclassis = | superordo = | unranked_ordo = clade [[Vetigastropoda]] | subordo = | superfamilia = [[Trochoidea (superfamily)|Trochoidea]] | familia = [[Calliostomatidae]] | familia_authority = Thiele, J., 1924 | genus = '''''Calliostoma''''' | genus_authority = [[Swainson]], 1840 <!-- | subdivision_ranks = Species | subdivision = See text. --> }} The '''Top shells''' (which are called '''Calliostoma''') are [[Ocean|marine]] [[gastropod]] [[mollusc]]s. They can be found world-wide. The name of this genus is derived from the Greek words ''kallos'' (beautiful) and ''stoma'' (mouth), referring to the pearly [[aperture]]. {{biology-stub}} [[Category:Gastropods]]