ID needed! Strange bracket fungi found

These bracket fungi were found on a decaying hardwood trunk in a tropical rainforest of Costa Rica, at about 1300 meters elevation.
They are spongy/rubbery with a woody stem. Slightly tacky/sticky to the touch.
Small round pores visible on top. Bruising an orange-ish color.
Young mushrooms appear pale yellow and somewhat bulbous... more mature ones have a bright orange color to rim and on the underside.
They remind me of varieties of Ganoderma... but so far I have not been able to make a positive ID.
Fresh odor, no bitter flavor.
Anyone?

Give it time, it looks like it might develop into Chicken of the woods. We had some growing on fir trees, by the time we got back to them they had been eaten by Wood Peckers.

I thought perhaps Laetiporus (Chicken of the Woods)... hopeful, but not convinced.

Has similar looks to various species of Ganoderma, but doesnt match any that I know of, at least not this stage... and no bitter taste.

It is very rubbery, and as I said before a bit sticky or tacky feeling.

Sometimes I find tropical mushrooms that really challenge me!

Still hopeful for an ID... and would be quite pleased if they turned out to be cotw.

wait for it to form a shelf then shelfs.

what kind of tree is that, vertical bark?

tree - unknown to me...
It is only a partial tree now... most has decayed... a decaying stump remains.
Once a tree in the Costa Rican rainforest, presumably a hardwood.

You are in a Tropical Rain Forest. Many species few individuals. May or may not even be known to science yet. I would talk to one of the naturalists at INBio in San Jose. They might be able to help. http://www.inbio.ac.cr/en/default.html

Thanks Chad.
I often reference inbios fungi guides: http://www.inbio.ac.cr/papers/hongos/macro_galerias.htm

I just may write them though... as this particular fungi has many mushroom fans baffled.

I have found a few like that here... I guess the rainforests still have rare finds when it comes to plants and fungi.

I bet the good people at inbio will be thrilled to help. I really enjoyed my visit to their park back in 2000. I saw my first blue crowned mot-mot there.

I agree - possibly a new species. Maybe related to Fomitopsis?

What color are the spores?

The spores are white.

You might try posting your observations at mushroomobserver.org to see if anyone there can I.D. it.

Every time I look at the pics my opinion changes. It might be Laetiporus.

Ganoderma have brown spores, so we can rule that out.