Sarmientosaurus

Sarmientosaurus is a titanosaur that wasn't described until 2016. It was in the middle of 30 to 40 feet long. It weighed up to 10 tonnes. The sauropod is so far found by it's skull and braincase. Despite being found by it's braincase, it wasn't as smart as small theropods such as Deinonychus. It had a basal form of titanosaurs, rather then a heavy pose like Argentinosaurus.