Did a spider ever kill an elephant?

Answer 1

if the spider is venomous yes and no, even if they're the most venomous spider in the world such as the wandering spider their fang wont able to penetrate the elephant thick skin, if the spider bite it in the eye or inside the ear or you coat the venom on you arrow and shoot the elephant now thats a different story, then the elephant will succumb to the venom and die, though i doubt the elephant would let a spider crawl in it's ear or why would a spider attack a elephant in the first place so no, spider never killed a elephant.

Answer 2

Pound for pound, spider silk could hold the weight of an elephant better than a steel bridge. The tensile strength of spider silk is 1,500 MPa* (217556.55 PSI), compared to the common structural steel used in the US, A36 steel which is 250 MPa (36,000 PSI).

*MPa = megapascals, it is a unit of pressure and when applied to tensile strength, it is a measurement of the amount of force necessary to compress or "mash" a sample of some material.