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. 2020 Sep 21;10:15357. doi: 10.1038/s41598-020-70175-y

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© The Author(s) 2020

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Most adducted hindlimb posture of Euparkeria. (A) Cranial view. (B) Right lateral view. Note the posture is not fully adducted, to accommodate the oblique angle of the ankle joint. Less hip abduction or further extension of the limb would result in the medial inclination of the foot. The rotation axes of the hindlimb are coloured depending on the possible motion: flexion/extension (blue), long-axis rotation (red) and abduction/adduction (green). Scale bar represents 3 cm. Note the non-alignment of the flexion/extension axes, making a fully parasagittal gait impossible.