As in Sharovipteryx, there is no way that Longisquama was a quadruped. The hind limb is twice the length of the forelimb, which due to toro length and elevation, barely reached the level of the knee when bipedal. The torso is also long with a center of balance just anterior to the ilium, far from the humeral glenoid. So, with two pterosaur sister taxa now obligate bipeds