• North American English a large American wild cat with a plain tawny to grayish coat, found from Canada to Patagonia. Also called cougar, mountain lion, puma
Panthers are NOT "always black", as the title of this post and the crux of the linked article state. The condition is "the opposite of albinism", which implies similar rarity — not a constant. 😶
Genera are within families, not the other way around. Maybe read a book?
Also: the genus Panthera consists of 5 big cats. The other two big cats that aren't in Panthera are the cougar, which is also colloquially called a panther, and the cheetah.
So, in fact, "panther" can refer to any big cat other than cheetahs.
Oh no! You’re right. How dare I use a dictionary of all things to define words? What was I thinking. Of course your superior intellect could easily see through my charade. Whatever would we do without you around to point out our mistakes?