apertural muscle
From ZooTerms (Dictionary of Invertebrate Zoology)
Revision as of 12:17, 10 September 2013 by Andreas Plank (Talk | contribs)
Bryozoa: Gymnolaemata) One of either two pairs of muscles of cheilostomate autozooids, the occlusor muscle of the operculum or the diaphragmatic dilator muscle.
apertural muscle: (