I have posted it in the ID forum, and Lin suggested to post it over here where the experts are ..

I met it in the Botanical garden of Rio de Janeiro, so maybe not necessarily native to Brazil.
Maybe someone knows more?

That's a very nice plant. Are you sure it's a Philo? It does have a bit of an Anthurium look about it. I hope someone can identify it.

Thanks Zig, no I'm not sure at all it is a Philo, in fact I have no clue...

It looks very similar to a large Anthurium I've seen at one of my local nurseries. I've been too scared to take a close look at it though, I bet the price tag will be bigger than the plant itself At the moment I'm down south for a family Christmas get together. When I get back home I'll check it out a bit closer (but not take my wallet with me )

I think it's an Anthurium also. I know I've seen a picture of either the same or very similar plant somewhere recently, a Birds Nest type of Anthurium ?

It is Philodendron subgenus melinonii. Thanks to leland Miyano for the ID!
I also got this interesting info from him:

That is Philodendron subgenus Philodendron melinonii. Normally it grows high in trees in the Amazonian region of Brasil and adjacent countries. The plants form rosettes about 6 feet or more in diameter. Very attractive and easily grown. As you can see, it also can be grown as a terrestrial. Recently, I have been seeing more hybrids with this species as one parent. It is a self heading species, but, it is not a Meconostigma.

Thanks to all for your help!

That's great Myriam. Aloha.