Aaron, nice plant!
Since it's a hybrid, it's not going to have a latin species name. The grex name, Spider's Gold, is all you're going to get!
However, these are the parents that made up the grex, back down to the original species in latin:
Spider's Gold = Brs. Arania Verde X Brs. arcuigera (pollen parent is a species)
Brs. Arania Verde = Brs. Rex X Brs. gireoudiana
Brs. Rex = Brs. verrucosa X Brs. gireoudiana.
So there you have it, the lineage back down to the species that made up the hybrids that made up Spider's Gold.