Discovery and naming
In 2025, Agnolín et al. reported on a diverse fossil locality in the Marín family Farm near General Roca city and the Salitral Moreno lowlands in Argentina, representing outcrops of the Anacleto Formation. Among the bones discovered were abundant titanosaur remains belonging to several individual animals, including dorsal and caudal vertebrae, a partial pubis and coracoid, and incomplete bones of the fore- and hindlimbs. [1]
In 2025, Agnolín et al. described Chadititan calvoi as a new genus and species of titanosaurs based on these fossil remains. They established MPCN-Pv 1034—comprising nine caudal vertebrae, the top parts of both humeri and ulnae , the bottom part of the right radius , the end of the left pubis, both ends of the right femur , the top part of the left tibia and both ends of the right tibia and fibula , and indeterminate metapodials—as the holotype specimen. They further referred seven additional specimens, including a possible juvenile individual, of varying levels of completeness based on their comparable anatomy and discovery location. The generic name, Chadititan, combines the Mapudungun word chadi, meaning "salt"—in reference to the type locality being near a vast salt flat—with the word "titan", referencing the pre-Olympian gods of Greek mythology. The specific name, calvoi, honors Argentine paleontologist Jorge O. Calvo who coined the taxonomic group Rinconsauria, to which this taxon belongs. [1] [2]
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