I've found one which does look a good match, except the name is unresolved and it appears to be only in the Fiji Islands.
Lomariopsis brackenridgei .. this site is for the flora of the island of Moorea, French Polynesia.
http://ucjeps.berkeley.edu/moo...
http://www.theplantlist.org/tp...
http://sweetgum.nybg.org/vh/sp...
There's a good list of Lomariopsis on the Plant List, I don't seem to be able to find ferns on Flora do Brasil.
It really does look like a Lomariopsis sp. but that can be misleading.
http://www.theplantlist.org/tp...
Didn't I once find a site with a list of ferns for Brazil?
If you're feeling brave I found a site listing ferns of the world, I looked at some but there doesn't appear to be distribution.
http://homepages.caverock.net....
