Well I am going to read lightsaber boy's recent -- 15 years later and this is where I am at interview -- before posting anything here.

How about "Golem Spider" because it makes a Golem. Golems are endemic to D&D folklore and secular literature as well as Jewish folklore. Golems are made of mud and debris and they are animated by a magician. It seems a fitting metaphor.

Perhaps there's a similar creature in indigenous amazon folklore to the Golem and if so, I submit that as an alternate name too.

I'd like to know how many webs had 8 legged constructs and if that's the sole instance, I'd go with your fungus theory. I figure you scientifically ruled out it was the exoskeleton of a dead spider.

Why do you call it a 'he'? Did you sex it? Do only females of this species create webs?

GOLEM SPIDER GOLEM SPIDER GOLEM SPIDER GOLEM SPIDER GOLEM SPIDER GOLEM SPIDER GOLEM SPIDER GOLEM SPIDER GOLEM SPIDER GOLEM SPIDER GOLEM SPIDER.

Here's a naming suggestion: Google/Image Search each of the proposed spider names come up and see what kinds of associations (other than to what presently seems to be called 'the decoy spider') already exist.