CLADOENDESIS OF EPHEMEROPTERA
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Figs 1–8. Larval exuviae. 1–2 – Procloeon (Monilistylus) monilistylus: 1 – right half of pro- and mesonotum; 2 – thoracic sterna, pleura, metanotum, abdominal sterna and terga. 3–8 – Procloeon (Monilistylus) ornatipennis: 3 – right half of pro- and mesonotum; 4 – head; 5 – thoracic sterna, pleura, metanotum and two legs; 6 – abdominal sterna and terga (with caudalii of holotype); 7–8 – caudalii of holotype, enlarged.