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Fig. 23 | BMC Evolutionary Biology

Fig. 23

From: The oldest described eurypterid: a giant Middle Ordovician (Darriwilian) megalograptid from the Winneshiek Lagerstätte of Iowa

Fig. 23

Pentecopterus decorahensis, SEM images of cuticular structures. a SUI 139963, scales on juvenile appendage. b SUI 139951, scales and setae on coxa of appendage III. c SUI 140020, scales on mesosomal tergite. d SUI 139951, scale and seta on appendage III coxa. e SUI 140031, scale on mesosomal tergite showing base of seta projecting from beneath the posterior margin. f SUI 140054, follicle on mesosoma with base of seta. Scale bars for a, b, e = 100 μm, c = 1 mm, d, f = 50 μm

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