 Other pseudosuchians with upright limbs were typically "pillar-erect", with their femurs attached into a hip-socket that faced directly downwards.The buttress-erect posture of "Terrestrisuchus" and other basal crocodylomorphs is unique amongst crocodile-line archosaurs, and restricted its posture to a permanently upright stance.Its posture was further restricted to an upright gait by the calcaneal tubercle on its heel bone pointing directly backwards from the foot, unlike the back-and-sideways facing tuber of modern, sprawling crocodilians.