the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Cephalopoda > [noun] > member of > parts of > tube connecting shell-chambers
siphunculus1752
siphon1822
siphuncle1822
sipho1888
1888 G. Rolleston & W. H. JacksonForms Animal Life (ed. 2) 458 The chambers are traversed by a tube—the sipho or siphuncle.
1888 G. Rolleston & W. H. JacksonForms Animal Life (ed. 2) 464 The sipho is formed by two free folds.
This entry has not yet been fully updated (first published 1911; most recently modified version published online June 2018).