CLADOENDESIS OF EPHEMEROPTERA
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Fig. 94–100. Petersula heptagenoides, larval exuviae (with the same magnification). 94 – thoracic and abdominal sterna with thoracic pleuron and half of postnotum; 95 – left half of pronotum and mesonotum, humeral setae enlarged; 96 – head with labrum and mandibles; 97–99 – fore-, middle and hind legs, 100 – abdominal terga.