Very rare giant planktonic foraminifers which are here provisionally attributed to "Globigerina ciperoensis" have been discovered in flysch sediments from the Oligocene (Globigerina ampliapertura planktonic foraminiferal P20 zone) of the Haute-Savoie in France. These forms attain a diameter of 650 μm (at least two times larger than "normal"- sized Globigerina ciperoensis specimens) and possess a Turborotalia-like extra-umbilical aperture. The limited number of specimens prevent us from creating a new formal taxon. The composition and diversity of the associated foraminiferal assemblage indicate a low oxygenated, deep marine, middle bathyal environment.