CLADOENDESIS OF EPHEMEROPTERA
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Figs 1–15. Procloeon monilistylus, larva. 1–3 – cercus and two portions of its distal part; 4 – labrum; 5 – right mandible; 6 – left mandible; 7 – maxillary palp; 8 – labial palp; 9 – paraproct and margin of tenth abdominal tergum; 10–15 – tergalii of pairs I, II, IV, V, VI and VII.