Arizonasaurus babbitti (Welles 1947, Nesbitt 2003) Middle Triassic ~240mya, was derived from a sister to Vjushkovia. Arizonasaurus was a sister to Yarasuchus within the Ticinosuchidae, a clade that represents a mixed bag of morphologies, meaning it no doubt had a more ancient last common ancestor.
Distinct from Vjushkovia, Arizonasaurus probably had a longer premaxilla (but this is a guess based on the related Qianosuchus). The anterior maxilla was deeply convex. The temporal and cheek elements were gracile.
The cervical centra were smaller, but the neural spines were very tall. The dorsal neural spines were taller still, creating a Spinosaurus-like sail.
The scapula was much smaller, almost petite, suggesting the forelimbs were likewise small creating a possible bipedal configuration. The hyper-elongated pubis was nearly matched by an equally gracile ischium that descended nearly as far. This trait also leads to the idea of a possible bipedal configuration, as in dinosaurs, if the femora were as long as pubis or longer, as in sister taxa.
The high sail was decorative and added to the surface area of Arizonasaurus, creating a larger solar collector/heat radiator for faster and more precise internal temperature regulation and greater stiffening of the dorsal spine, perhaps for elevating the forelimbs.