CLADOENDESIS OF EPHEMEROPTERA
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Fig. 16–19. Fine bifurcate and non-bifurcate setae of larvae. 16 – Cloeon dipterum, row of bifurcate setae near posterior margin of pronotum (d on Fig.14); 17 – Procloeon sp., row of bifurcate setae on abdominal sternum VI (j on Fig.15); 18 – Cloeodes vibratorius, non-bifurcate seta on abdominal tergum VII; 19 – Cloeodes superior, bifurcate seta on abdominal tergum VII (g on Fig.14).