At first I thought this weird-looking thing was a seed. I found a virus that looks similar called Crinivirus virion. Google the name. Toni

I wouldn't worry too much about the companion fungi. Plants ignore, tolerate, and form symbiotic relationships with thousands and thousands of species of fungi, with only a few being detrimental. While we may not know what type of fungus it is, we do know it's not a virus. Viruses are much smaller even than bacteria, & an electron microscope is the tool of choice for observing them.

Al