A new type of 'node' in the myelin sheath of an invertebrate nerve fibre.
D000818:Animals; D009186:Myelin Sheath / Q000166:cytology*; D009413:Nerve Fibers, Myelinated / Q000166:cytology*; D009835:Oligochaeta / Q000166:cytology*; D011901:Ranvier's Nodes / Q000166:cytology