CircumstellaCircumstella is a genus of sea snails, marine gastropod mollusks in the family Liotiidaewithin the superfamily Trochoidea, the top snails, turban snails and their allies.SpeciesSpecies within the genus Circumstella include:Circumstella biconcava Feng, 1996Circumstella biconcave Feng, 1996 ''Circumstella devexa''