CLADOENDESIS OF EPHEMEROPTERA
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Figs 1–10. Potamocloeon dentatum. 1 – head and thorax of male imago from Uganda; 2 – its abdominal sterna and terga; 3 – abdominal sterna and terga of male imago from Mali; 4 – abdominal sterna and terga of male subimago from Uganda; 5 – hind leg of male imago; 6 – subimaginal mesonotum; 7–10 – genitals: 7 – holotype; 8–9  specimens from Mali; 10 – specimen from Uganda.