CLADOENDESIS OF EPHEMEROPTERA
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Figs 70–72. Potamocloeon edentatum sp. n. 70 – subimaginal exuviae of gonostyli; 71 – genitals of male imago (gonostylar muscle shown only on right side, gonovectal muscles shown only on left side, gonoducts shown by dotted line); 72 – larval protogonostyli with developing subimaginal genitas inside. Abbreviations: gs1–gs3 – segments of gonostylus; m.IX-X – areas of anterior attachment of median paraproctal muscles (i.e., muscles going from sternum IX to common base of paraprocts); m.sg – median sterno-styligeral muscle; pgs – protogonostylus; usg, unistyliger.