Fig. 11

Hoplitaspis hiawathai, specimens preserving morphological details of the postabdomen. a UWGM 1838 (part), postabdomen and telson. b UWGM 1838 (counterpart), postabdomen preserving segments 8–12 in three-dimensional relief, from dorsal (left) and ventral (right) view. c UWGM 1947, postabdomen. d UWGM 1948, postabdomen. e UWGM 1880 (counterpart), specimen in oblique view showing extreme curvature of postabdominal segments and the positioning of the buckler tergites above the buckler ventral plate. f UWGM 1880 (part), demonstrating the extreme curvature of the postabdominal segments are due to telescoping, with the inner margins of the segments strongly overlapping while the outer margins of the segments exhibit disarticulation. Scale bars = 10 mm