Mario Santiago Papasquiaro is the pen name of José Alfredo Zendejas Pineda (Mexico City, December 25, 1953–1998),[1] Mexican poet and co-founder of the infrarrealista poetry movement.

In 1976, he founded the Infrarrealismo (Infrarealism) movement along with Roberto Bolaño, Cuauhtémoc Méndez Estrada, Ramón Méndez Estrada, Bruno Montané, Rubén Medina, Juan Esteban Harrington, Óscar Altamirano, José Peguero, Guadalupe Ochoa, José Vicente Anaya, Pedro Damián Bautista,[3] and Mara Larrosa.

Santiago inspired the character of Ulises Lima in fellow infrarealist Roberto Bolaño's novel The Savage Detectives.

[4] Like Santiago, the Lima character is an eccentric adventurer, and an opponent of the traditional forms of writers who sold out for state scholarships.

Santiago frequently made enemies due to his sincerity and open criticism of what he deemed inferior forms of poetry, the literary elite, and poets themselves.