siphonal fold
From ZooTerms (Dictionary of Invertebrate Zoology)
Revision as of 23:35, 13 September 2013 by Andreas Plank (Talk | contribs) (1 revision: import_simple_(-definition))
Mollusca: Gastropoda) A ridge corresponding to the siphonal notch that winds spirally around the columella.
siphonal fold: (