GAUDEAMUS PARITER vs. AVE VIRGO VIRGINUM

Apparently the AVE VIRGO VIRGINUM I was looking for is listed as GAUDEAMUS PARITER, and apparently all the many references to Johann Horn as its composer should read Johann Roh (either that, or the few but dominant references to Roh should be moved to Horn). And perhaps the CCEL folks could redo the PDF with "Brethren" for "Gethren".

Or is AVE VIRGO VIRGINUM a portion of GAUDEAMUS PARITER? That is suggested by the search results if you look for it (AVV) by tune name.