CLADOENDESIS OF EPHEMEROPTERA
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Figs 33–38. Procloeon (Monilistylus) ornatipennis: 33 – larval exuviae of posterior margin of 9th abdominal sternum with protogonostyli; 34 – subimaginal tissues with gonostyli, extracted from it; 35 – exuviae of paraprocts and protogonostyli of another specimen; 36 – exuviae of 5th abdominal sternum (Figs 33–36 under the same magnification); 37 – middle of posterior margin of 9th abdominal tergum; 38 – portion of mesonotum (magnification as in Fig. 37). Abbreviations: gs1, gs2, gs3 – segments of gonostylus; m.gs – gonostylar muscle; m.gv – gonovectal (penial) muscle; m.s – lateral portion of styligeral muscle.