Fig. 3

Hoplitaspis hiawathai, specimens preserving morphological details of the prosoma and opisthosoma. a UWGM 1877 (part), relatively complete specimen in dorsal view, displaying the lateral and median eyes on the prosomal shield and the dorso-lateral expansion of the second tergite. b UWGM 1877 (counterpart), preserving aspects of the prosomal ventral plate. c UWGM 2046, dorsal view of exfoliated specimen showing the coxa of the prosomal appendages in situ with the metastoma being partially overlain by the buckler ventral plate. Details of the coxal gnathobases are shown in an expanded box view. d UWGM 2275, two specimens preserved in association. UWGM 2275A (right) preserves details of the prosomal appendages, including a rare dorsal view of appendage VI, displaying the lateral overlap of the sixth podomere by the fifth. UWGM 2275B (left) shows details of the pretelson and telson. IV–VI = prosomal appendages IV–VI. Scale bars = 10 mm, with the exception of the expanded box of C, where the scale bar = 1 mm