Eugenia del Pino studied many other marsupial frogs and found a Venezuelan one called "Flectonotus pygmaeus" that has adapted to its large egg by having oocytes that at early stages have up to 3000 meiotic nuclei in a single cell. The many nuclei are gradually lost until in the mature yolky oocyte only a single one remains, forming a single germinal vesicle. Eugenia's discovery of the amazing biological adaptations of marsupial frogs lead to a famous Scientific American Article in 1989.