[littlestymaar]

> edit: they're heterotrophs

Except not these ones! These are autotrophs fungi, they do some kind of photosynthesis (it's absolutely not the same metabolic path, though) gaining their energy from gamma rays instead of food.

Edit: The above comment is wrong, I though autotroph vs heterotroph was about energy input (as a matter of fact I'm very convinced it was how my college teacher explained it) but from wikipedia it looks like I'm wrong, and such fungi would be classified as Photoheterotroph[1]

[1]: https://en.wikipedia.org/wiki/Photoheterotroph

[meepmorp]

Yes, but they're still fungi. They might be extracting some amount of energy from radiation, but they still get most of their energy (and cellular raw material) the old fashioned, biological way. It's not like they suddenly evolved replacement pathways to synthesize all the products they need.