Look, we have one distinct species we consider human.
But the question is how do you define it?
"Species" is a construct to make it easier for us. We like to classify things. We probably have a brain that favors classifying things. We certainly have brains that favor "us" versus "them". But there really is no such thing as "species" - it's just a convenient lie.
The old rule, "can breed with and produce viable offspring" does not work - evolution killed it. Species that cannot interbreed have a common ancestor, That logically kills that definition (and most others, like your attempt to define humans using human as part of the definition - a classic begging the question).
All living things on earth are related. There are no precise boundaries between "species". Our parents differs slightly from us, and our grandparents even more We may classify our great-N-grandparent or Nth cousin a different species, but we have no rules for saying that our great-N-grandparent was a different species while our great-N-1-grandparent wasn't.
There is currently no objective rule that can say whether someone is or was human or not. Any such rule will either include what we consider other species or exclude some who we consider people. And most certainly, it won't stand the test of time, as we evolve into something we of today surely would call a different species.
I think we need to move beyond our propensity for pigeon-holing, and accept a gradient way of thinking, without boundaries, but degrees of similarity.
I'm very similar to my father, but less so to my ancestor 10,000 years ago, and very dissimilar to my ancestor a million years ago. There's no point in saying who was "human" - it was mostly a gradual change, with a little bit of hybridization throw in at times. I can't point to one of my ancestors and declare that he wasn't human, but his son was. But I can say how much they differed from me. That's useful. Making rules we cannot logically defend isn't.