Galactic Civilizations species scientific classification

I wonder, how do different species are scientifically classified in Galactic Civilizations? Especially by the Terran Alliance. Is it still the same as the current one, just expanded? Or is it completely different? How would Drengin, Torians, Arceans, Iconians and so on be classified as a species? Would Altarians be classified as a Homo group? Would the Yor be even considered alive?