CLADOENDESIS OF EPHEMEROPTERA
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Figs 52–57. Susua sigiensis. 52 – hind wing; 53 – penis, ventral view; 54–55 – genitals of male imago and its subimaginal exuviae, ventral view; 56 – genitals of another specimen (penis dotted, its hidden parts shown by interrupted lines; median styligeral muscle, gonovectal muscles and right gonostylar muscle shown by interrupted lines; areas of anterior attachment of median paraproctal muscles shown by dotted lines); 57 – subimaginal genitals developing under larval cuticle. Abbreviations: gs1, gs2, gs3 – 1st–3rd segments of gonostylus; usg – unistyliger.