Hey Philly guy! How are ya?
Yes. In fact, a few years ago when I first joined this forum there were pics of this posted which are prolly still around. Good observation (you know just cuz it's almost Halloween you didn't have to come up with a spider post

). I am glad you brought this up because I wonder if this (IMO fungi) came FROM the spider or ATTACKED the spider.
Here's my favorite song again:
I know an old woman who swallowed a spider that wiggled & jiggled & tickled inside er
She swallowed the spider to catch a fly
I don't know why she swallowed the fly
Perhaps she'll die............
Remember that from childhood? Before your time?
Anyway, here's another observation from moi last night. I put on a sweatshirt and was sitting and typing. I noticed a slight prick on my arm under the sleeve. When I pulled it up, what looked like a white fuzz which could easily have been the fleece from sweatshirt JUMPED back into the fleece. Whaaa? I rolled it back down and thought maybe it was just a thread with fuzzball attached to the sleeve and forgot about it. Few minutes later another prick, pulled up sleeve again and grabbed the sucker and scoped it. Unfortunately I dumped emersion oil on it on the slide and what was once very precise and clear became undistinguishable this morning when I looked. Durn! But last night it was green, had two main arms that were still flailing away under the scope until it suffocated by the oil, and had a body that looked composed of the fibers we are dealing with. Oh and it had drops of blood in it from biting my arm. I was going to photograph but didn't have it set up and was tired. Shoulda woulda coulda. I wonder it that jumpin' fuzzie is related to your spider? ;-)
Kritts