[1] She has “the distinction of being the first female vertebrate paleontologist in Latin America.”[2] Mathilde Dolgopol de Sáez was born on 6 March 1901 in La Plata, Argentina.

[2] While she was still a student, she got a job as an assistant in the mineralogy department of the La Plata Museum and then remained working at this institution for her entire scientific career.

[4] During this time she held various positions, such as head of the laboratory and practical research in the department of paleontology, which she achieved after completing university teaching.

Her scientific work began in 1927 with her publication of the first description of the fossil bird species Liornis minor in the journal Physis.

[3][5] In 1955, Dolgopol de Sáez was a founding member of the Asociación Paleontológica Argentina alongside Osvaldo Reig.