CLADOENDESIS OF EPHEMEROPTERA
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Figs 11–13. 11–12 – Potamocloeon dentatum: 11 – genitals of subimago; 12 – genitals of imago (styligeral and gonostylar muscles shown only on left side, gonoduct shown by dotted line). 13 – Potamocloeon edentatum, fore wing (holotype). Abbreviations: gd – gonoduct; 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.