'Fraid I can't confirm one way or the other. I've never seen one of those egg balls hatch, although my instinct are saying 'fungal infection' to me. Something about it doesn't look healthy to me.
The egg sacs of other species don't become discoloured prior to spiderling emergence, so I've no reason to suppose they would in cave spiders either, but as i said, I can't be completely certain.
The egg sacs of other species don't become discoloured prior to spiderling emergence, so I've no reason to suppose they would in cave spiders either, but as i said, I can't be completely certain.