Vestigial may not be the correct word. We do use our nails quite a lot for finer manipulation of tools
It also serves to enable very precise grip in a way that a blunt fingertip couldn’t (pinching something very tiny), to enable us to scrape things, and to protect the fingertip from injury. It definitely isn’t vestigial.
I mean… nails on our hands definitely have a function, yes. But they only serve those functions because they’re not proper claws. If we actually had claws, we wouldn’t manage such fine manipulation.
I think that’s more like a happy accident though. I was more thinking about toenails. My late father’s (RIP stubborn bastard) nails definitely were closer to claws than nails.
And that made me think of elephant toes. Did you know elephants are basically tiptoeing all the time, btw? It just very much doesn’t look like it.
Correct. A vestigial structure however is one that is no longer needed and is greatly diminished but is retained anyway because there’s little selective pressure against it. It need not be completely useless, but fingernails serve multiple legitimately important functions in humans and thus aren’t vestigial.
I mean… evolution can “repurpose” things. So the thing it was before isn’t needed and it’s capacity to do what it did is greatly diminished. Ie we couldn’t claw food or earth really even, so our nails would not qualify as claws as much as they once must have been similar to what rodents have.
I do take your point though, as in “vestigial” referring to an organ or a part of anatomy which hasn’t got a purpose. And nails still serve purposes that claws might as well, like prying open nuts or some such basic stuff.
But if we discard the manipulation abilities we have on our forelimbs and only consider toenails, what then? Would you consider toenails vestigial claws?
Also I notice I start all my comments with “I mean…” and it’s kinda futile.
(I had a glass of wine for breakfast.)
“in my opinion” would be a better alternative
“Listen up bitches” works too
Evolution is nothing but a series of happy accidents. And a graveyard of unhappy ones.
And teeth may have* developed from scales (no joke!) ;)
Edit: added * as a result of the information below (thank you, again!)
Sorry but it’s pretty well established that teeth developed because our skeletons wanted some air.
Just be careful to not let the rest of those bones out. They try at night because they don’t like to be wet constantly.
Teeth aren’t actually bone, technically, afaik.
Oh, thank you! Didn’t know about this!
Me neither.
Nice.
My ancestor must have suffered from some sort of scale baldness, as I congenitally lack 4 permanent teeth. We don’t suffer from actual baldness though, luckily.
Where’d you get my selfie from?
As are hooves.
True enough.
Ever thought about how those work in the womb? They’re not hard to begin with and covered with a “capsule” (which is the same thing biologically we have at the base of the nail; the eponychium is the thickened layer of skin at the base of the fingernails and toenails. It can also be called the medial or proximal nail fold.
