Favoritos de muddles

galls on Eucalyptus leaves

Possibly.
Compare with Holyplatus complanata group.
Holyplatus has a very flat body and cephalic depressions between posterior lateral eyes

Tiny male bees roosting together.

possibly the egg cases of parasitic wasps

On Amphibolis antarctica.

16 mm long (head to distal apex of elyptra).

possibly

under bark, very small, with long antennae

possibly

with its previous clothes

unsure

Parasitic fungi on a spider (Possibly Tamopsis sp.)

Spider shedding exuviae

Egg sac.

Couldn't work out what they were in the field. my not be right even now.

galls