nepionic constriction
From ZooTerms (Dictionary of Invertebrate Zoology)
Revision as of 23:35, 13 September 2013 by Andreas Plank (Talk | contribs) (1 revision: import_simple_(-definition))
nepionic constriction: (Mollusca: Cephalopoda) In a nautiloid shell, a definite growth discontinuity of the shell micro-ornamentation thought to correspond to eclosion from the egg.
