Extended Data Fig. 9: Single most-parsimonious tree found when analysing only the three-dimensional morphogeometric configuration of the inner ear and three-dimensional examples of how distances and angles were measured in the three-dimensional endosseous labyrinth models.
From: Enigmatic dinosaur precursors bridge the gap to the origin of Pterosauria
a, Tree rooted with T. buettneri. b, Three-dimensional model of the left endosseous labyrinth of Plateosaurus sp. (HMN R1937) in dorsolateral view. c, Labyrinth with reference plane for sectioning indicated. d, Landmark scheme for semicircular canal length measurements. e, Landmark scheme for asc circumference and labyrinth height measurements. f, Landmark scheme for labyrinth width measurements in ventral view on the reference plane. g, Landmark constellation explanation. asc, anterior semicircular canal; cc, common crus; enla, endosseous labyrinth; lsc, lateral semicircular canal; psc, posterior semicircular canal; ve, vestibule.
