A parasympathetic ganglion located on the short ciliary nerve differentiated from the main ciliary ganglion by virtue of the fact that it had no root derived directly from the inferior trunk of the oculomotor nerve and it never attaches to this nerve.
Comment:
[taxon-note] "tested for and found to be present in pig, sika deer, domestic sheep, horse, cat, fox, racoon dog, marten, rat, rabbit, crab-eating macaque, japanese macaque and human[PMID:2802184]"