It feels like you are trying too hard to associate your specimens with traditional insects or animals.
Why can't it just be an unidentified, prolific, and deliberate goo that forms networks, and takes many different forms depending on what it becomes involved with, both within the host and the host's environment? That's what it feels like to me.
I won't pretend to understand whether the goo creates fibers or the fibers create the goo. Four years have not taught me that. Nor have I gained any understanding of the toxicity or lifespan of fibers outside of the host.
BTW I'm still really liking the Head and Shoulders suggestion Maybelle.