Auto-Heal - _TNY_0215
If a spider, like this adorable little Attulus terebratus jumping spider loses a leg, it doesn't bleed out (or whatever it's called since spiders have haemolymph and not blood). Their joints have sort of a valve which closes up. The coolest part is that if the spider isn't fully grown yet, when it's time to moult, the new exoskeleton actually regrows the leg.
Obviously, there isn't room for an entire leg in there so it grows partially with each moult.
Mr. Green Eyes here is in the middle of this process if you look at his right front leg (on the left side here) you can see it is significantly thinner than the one on the other side. I don't know if this had moulted its final time (those mittens look pretty loaded), but if not, then that leg will probably be back to normal. And even if it didn't grow back more than this, the spider still got around just fine.
Auto-Heal - _TNY_0215
If a spider, like this adorable little Attulus terebratus jumping spider loses a leg, it doesn't bleed out (or whatever it's called since spiders have haemolymph and not blood). Their joints have sort of a valve which closes up. The coolest part is that if the spider isn't fully grown yet, when it's time to moult, the new exoskeleton actually regrows the leg.
Obviously, there isn't room for an entire leg in there so it grows partially with each moult.
Mr. Green Eyes here is in the middle of this process if you look at his right front leg (on the left side here) you can see it is significantly thinner than the one on the other side. I don't know if this had moulted its final time (those mittens look pretty loaded), but if not, then that leg will probably be back to normal. And even if it didn't grow back more than this, the spider still got around just fine.