the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Cephalopoda > [noun] > order Dibranchiata > section Decapoda > family Spirulidae > genus Spirula > member of
spirule1851
1851 M. RobertsMollusca 57 The Spirule, like the Nautilus, has a chambered, siphonated shell.