Maxakalisaurus is a genus of titanosaur dinosaur, found in the Adamantina Formation of Brazil, in the state of Minas Gerais in 1998.

[1][5] The type specimen of Maxakalisaurus belonged to an animal about 12.1 meters (40 feet) long, with an estimated weight of 5 tonnes (5.5 short tons).

[1][6] It had a long neck and tail, ridged teeth (unusual among sauropods) and lived about 80 million years ago.

Because sauropods seem to have lacked significant competition in South America, they evolved there with greater diversity and more unusual traits than elsewhere in the world.

[1] França et al.'s 2016 description of the second specimen also included a phylogenetic analysis, which placed Maxakalisaurus as a basal member of the Aeolosaurini.