(Greek: 'υπερβολαιων = "superfluous", "of the excessive [strings]")
This tetrachord is conjunct to the diezeugmenon tetrachord just below it. The Greek note-names, in descending order of pitch, are nete, paranete, and trite, and the conjunct note at the bottom is nete diezeugmenon -- the Greek naming system actually makes this lowest note a part of the next lower tetrachord. In the medieval literature the version in the diatonic genus is equated to the letter nominals (descending) a':g:f:e.
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