Here's what we know:
* Origins: The origins of "El Son de la Negra" are debated, but it likely emerged in the 19th century in the eastern region of Cuba.
* Evolution: The genre went through several evolutions, with various influences from other musical styles like son cubano, bolero, and rumba.
* Popularity: It gained widespread popularity in the early 20th century, with numerous artists performing and recording "Son de la Negra" songs.
It's important to note: Since it's a genre, it doesn't have a single creation date. It's more accurate to speak about its origins and development over time.