CLADOENDESIS OF EPHEMEROPTERA
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Figs 14–20. Thraulodes ludmilae, exuviae of mouthparts of holotype (14, 17–19 at the same magnification): 14 – labrum; 15 – its anterior margin with focus on dorsal side; 16 – the same, with focus on ventral side; 17–18 – left and right mandibles; 19 – labium and maxilla; 20 – dorsal side of glossa. Abbreviations: anter.r – limits of anterior transverse row of setae; poster.r – posterior transverse row of setae; other arrows show six sensilla separating five denticles.