Machu picchu de "perfect tree"

Hi, since the seed was placed in napkins, 93 hours have already passed, that is, just under 4 days. I won’t consider it slow growth yet, but rather normal; it’s certainly not vigorous growth.
What I did see is that in the substrate cup, which has expanded clay at the base and no coco (it’s very compact), there are “spiderwebs” on the top. I doubted whether it was the product of an insect or mycorrhizae. What do you think? To me, they seem like mycorrhizae.

fatal accident!!! it fell to the ground, and the worst happened, its root apex, the meristem, broke.
I quickly removed it from the substrate and put it back in the germinator, we’ll see if it survives, more details are in the Growlog, I’ll wait a few days and if it stops being white after 48 hours I’ll have to consider it lost in action