
Carlos Ciriaco Ameghino was an Argentine paleontologist and explorer who accompanied his brother Florentino Ameghino throughout Argentina searching for fossils.

Florentino Ameghino was an Argentine naturalist, paleontologist, anthropologist and zoologist, whose fossil discoveries on the Argentine Pampas, especially on Patagonia, rank with those made in the western United States during the late 19th century. Along with his two brothers –Carlos and Juan– Florentino Ameghino was one of the most important founding figures in South American paleontology.

Zulma Nélida Brandoni de Gasparini is an Argentinian paleontologist and zoologist. She is known for discovering the fossils of the dinosaur Gasparinisaura, which was named after her.

Jorge Orlando Calvo is an Argentine geologist and paleontologist working for "Centro de Investigaciones Paleontológicas Lago Barreales".

Luis María Chiappe is an Argentine paleontologist born in Buenos Aires who is best known for his discovery of the first sauropod nesting sites in the badlands of Patagonia in 1997 and for his work on the origin and early evolution of Mesozoic birds. He is currently the Vice President of Research and Collections at the Natural History Museum of Los Angeles County and director of the museum's Dinosaur Institute. He was a postdoctoral researcher at the American Museum of Natural History, New York after immigrating from Argentina. Chiappe is currently the curator of the award winning Dinosaur Hall at the Natural History Museum of Los Angeles County, an adjunct professor at the University of Southern California, BBC advisor and author of scientific and popular books.

Felipe Mendez was born around 1897 in San Juan, Argentina and participated as a paleontological collector at the 2nd Captain Marshall Field Paleontological Expedition in 1926.

Bernardo Javier González Riga is an Argentinean paleontologist; he is internationally recognised for her research on sauropod dinosaur evolution, and was awarded in 2019. He has discovered in the Late Cretaceous strata of the Mendoza Province (Argentina) the huge sauropod dinosaur named Notocolossus, one of the largest land animal that ever found. He also described and co-described moren than 10 new dinosaur species.

Francisco Javier Muñiz was an Argentine colonel, legislator, and medical doctor. He treated patients and died during the Great Yellow Fever Epidemic of 1871. He was considered the first important naturalist from Argentina.