CLADOENDESIS OF EPHEMEROPTERA
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Fig. 5–12. Pseudo-bifurcate setae of Baetis (Tenuibaetis) frequentus from India. 5–8 – pseudo-bifurcate setae on outer side of tibia (7 – with hirudiform seta); 9–10 – pseudo-bifurcate setae on outer side of tibia (view in profile, in transmitted light); 11–12 – pseudo-bifurcate setae on anterior side of femur (surface view, in transmitted light).