Mary-Anne Martin is the woman who created the Latin American department at Sotheby's. In 1982 she started this gallery with the aim of showing and spreading the word about major artists from Latin America.
Paalen was a sculptor and painter who began his artistic career as a surrealist. You may wonder why an artist born in the Austro-Hungarian Empire is considered a "Latin American" artist; Paalen moved to Mexico in 1939. He also organized the first Surrealist exhibition there the year following his arrival. Find an interesting article on Paalen HERE.
Rahon was another European ex-patriot. Born in France, she went to Mexico at the same time as Paalen. In her case she didn't start painting until she arrived in Mexico. She began as a poet. The painting by her below has (or seems to have) various nods to indigenous art. It is oil and sand on board. Obviously the sand gives the painting its wonderful texture and depth. Find out more about here HERE.
Bandeira is a Brazilian artist who, to my knowledge, never moved to Mexico. He was born in Ceará, moved to Rio and then, in 1946 moved to Paris. He was an proponent of modernism. His own work began as more traditional landscapes and portraits but moved into gestural abstraction later in his career.