Is missing a important fight of Brazilian Lightweight figther Italo Hugo, The Golden Boy. In 1931, he defeated Juan Carlos Gazala for the south amareican lightweight championship by knockout in the 1st round.
I couldn't find information about Antônio Zumbano ( The "Zumbanão" ).
The first great brazilian boxing star, reignined undisputed from 1936 until 1950. He fought more than 140 fights, won mostly by KO. He was a midleweight.
source: http://www.boxergs.com.br/histori2.htm