Fig. 3 in Evidence for a Sauropod-Like Metacarpal Configuration in Ankylosaurian Dinosaurs

Fig. 3. Left manual skeleton of the ankylosaur Peloroplites cedrimontanus Carpenter, Bartlett, Bird, and Barrett, 2008 from Cedar Mountain Formation, Utah, USA (CEUM 12187–12193, 12218–12223); articulated correctly and incorrectly. A. Metacarpals in pollucal view, correctly articulated with phalanges: I (A1), II (A2), and III (A3). B. Metacarpals in proximal view, correctly articulated without (B1) and with (B2) available phalanges. C–F. Correctly (C1–F1) and incorrectly (C2–F2) articulated metacarpals shown in four oblique views with (C1–F1) and without (C2–F2) available phalanges. C. Craniodorsal view, centered on digit II. D. Craniodorsal view, centered on digit III. E. Laterodorsal view, centered between digits III and IV. F. Caudodorsal view, centered between digits IV and V. In both configurations the metacarpals are arranged in a tight arc, but they are vertical and parallel to each other in the correct configuration, whereas they are slanted and distally divergent in the incorrect configuration. Roman numerals refer to digit number.