Isasicursor

Isasicursor (meaning "Isasi's runner" after Marcelo Pablo Isasi) is an extinct genus of elasmarian ornithopod dinosaurs known from the Late Cretaceous Chorrillo Formation of Santa Cruz Province, Argentina. The genus contains a single species, Isasicursor santacrucensis. It was a contemporary of the titanosaur sauropod Nullotitan, which was described in the same paper.

== Discovery and naming == In 1980, geologist Francisco E. Nullo noticed the presence of sauropod bones on a hillside of the Estancia Alta Vista, south of the Centinela River in the Santa Cruz province of Argentina. He reported these finds to then-prominent paleontologist José Bonaparte. Bonaparte dug up a large sauropod cervical vertebra in 1981. The old site was relocated and new excavations were carried out between 13 and 17 January and 14 to 19 March 2019, and a new site was discovered on the Estancia La Anita. A new fauna came to light in an area of . The sauropod finds were named as the new genus Nullotitan, but bones from a new ornithopod were also discovered by technician Marcelo Pablo Isasi, which laid close to some mosasaur teeth.