Extended Data Fig. 6: Anatomy of caudal weapon osteoderms in S. elengassen holotype (CPAP-3165) and A. oliveroi holotype (MLP 86-X-28-1).
From: Bizarre tail weaponry in a transitional ankylosaur from subantarctic Chile
a, digital reconstruction and b, photograph of Stegouros elengassen caudal weapon cross section (at level of first osteoderm pair and 14th caudal vertebra) in anterior and left lateral views. c, d, Antarctopelta oliveroi dorsal osteoderm of the first pair in left lateral and anterior views. e, Stegouros elengassen, 3D reconstruction of the left second osteoderm in dorsal and internal views. f, Antarctopelta oliveroi left second osteoderm fragment in dorsal and internal views. g, h, Stegouros elengassen, digital reconstruction of the caudal weapon cross section (at level of second pair and 17th caudal vertebra) in anterior and posterior views. i, j, proposed configuration of the caudal weapon of Antarctopelta oliveroi in anterior and posterior views. Scale bars 10 cm.
