Styrioplax exiguus (Glaessner, 1928). A, complete specimen (RGA/SMNH 0889); note the fragmented and flattened dorsal carapace. B, dorsal carapace of specimen (RGA/SMNH 1490) showing three-dimensional preservation. C, dorsal carapace of specimen (RGA/SMNH 1208). D, male specimen (RGA/SMNH 0291) showing venter and merus of Mxp 3. E, male specimen (RGA/SMNH 1493) showing venter and supplementary coxosternal plate on sternite 8. F, close-up of supplementary coxosternal plate (arrows) on specimen (RGA/SMNH 1493). Specimens in B, C, D and E were whitened with ammonium chloride prior to photography. All scale bars represent 5 mm.