@Rayane Indeed, I seem to remember them being 'osiris' but I can't for the life of me remember what the source was or what that is based on. Ssp. massaesyla is certainly a dubious taxon in any case and the identification criteria compared to other subspecies are quite hard to gauge from what I recall.
Ahh sorry guys! I used a combination of Zootierliste and Joel Sartore's IDs to help with mine. I definitely defer to people more in the know like you two. I've changed the ID to not include subspecies.