CLADOENDESIS OF EPHEMEROPTERA
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Figs 47–51. Procloeon (Monilistylus) ornatipennis (holotype): 47 – median projection of penis; 48 – exuviae of subimaginal gonostyli; 49 – genitals with all visible muscles (muscles and hidden parts of penis shown by interrupted lines); 50 – the same with penis, its muscles and gonoducts (shown by dotted line); 51 – the same with muscles of styliger (penis not shown). Abbreviations: gs1, gs2, gs3 – segments of gonostylus; m.IX-X, – area of attachment of intersegmental paraproctal muscle; m.gs – gonostylar muscle; m.gv – gonovectal (penial) muscle; m.s – lateral portion of styligeral muscle; usg – unistyliger.