Mbiresaurus raathi (Griffin et al. 2022) Carnian, Late Triassic period, ~225 mya, 1.5 m in length, was the last common ancestor of sauropods and ornithischians in the LRT. Nearly the complete fossil is known in 3D, but disariculated.

Griffin C et al. 2022. Africa's oldest dinosaurs reveal early suppression of dinosaur distribution. Nature 609: 313–319.https://www.nature.com/articles/s41586-022-05133-x

wiki/Mbiresaurus