Hi mdorantes,
in regards to your list, I found the following 4 style names in the PA3X. I haven't had a chance to download yours yet, the names are identical, though.

They're actually in the World Category of styles.

Here is the list:

1 MARIACHI CUMBIA ritmo de música con Mariachi

12 MARIACHI POLKA música de Mariachi.

17 MARIACHI VALZ Muy popular el Valz con Mariachi

21 BOLERO RANCHERO Uno de los generos más románticos y populares