| Jaci Antonio Louzada Tupi Caldas | |
| Birth Date: | July 19, 1898 |
| Death Date: | 1946 |
| Death Place: | Porto Alegre |
| Nationality: | Brazilian |
| Field: | paleontologist |
| Known For: | Tupi Caldas |
Jaci Antonio Louzada Tupi Caldas (Also signed: Jacy Antonio Louzada Tupy Caldas, but was best known as Tupi Caldas.) (19 July 1898 - 1946) was a Brazilian paleontologist. He gave contributions to paleontology describing some of the animals found in the region Paleorrota.
He lived in Porto Alegre, was professor of military school and a member of the Historical and Geographical Institute of Rio Grande do Sul, formed in Pharmacy - in 1917 the Faculty of Medicine of Porto Alegre. In paleontology helped describe Dinodontosaurus pedroanum and Hyperodapedon mariensis.