An electron opaque backbone of the insect ovarian ring canal that is a part of or adjacent to the plasma membrane. The outer rim is established as the cleavage furrow is arrested, and contains F-actin, anillin, glycoproteins and at least one a protein with a high content of phosphorylated tyrosine residues.
Comment:
See also the fly_anatomy.ontology term 'outer nurse cell ring canal rim ; FBbt:00004882'.
Synonyms:
narrow_synonym:
nurse cell ring canal outer rim; ovarian ring canal outer rim