Grupo Umbral [the Umbral Group] was a literary group founded in Quito in 1952 which included notable Ecuadorian authors such as Alfonso Barrera Valverde, César Dávila Torres, Eduardo Villacís, Eduardo Félix, Guillermo Ríos, Alicia Yánez Cossío, Walter Franco Serrano and César Ayala.
Members
- Alfonso Barrera Valverde
- César Dávila Torres
- Eduardo Villacís
- Eduardo Félix
- Guillermo Ríos
- Alicia Yánez Cossío
- Walter Franco Serrano
- César Ayala