Possibly these two white grape varieties from South America are identical:
The name means "white egg-shaped" and probably refers to the olive-shaped berry shape. The descent (parentage) is unknown. One variety of this name is cultivated on 40 hectares of vineyards in the Maule area (Valle Central) in Chile (statistics Kym Anderson in 2010)
A variety of this name (also Blanca) is listed in the VIVC catalogue and is indicated as originating in Argentina. According to DNA analyses carried out in 2017, it comes from a cross between Listán Prieto x Muscat d'Alexandrie. It is used as a wine grape (no entry in Kym Anderson under this name).