CLADOENDESIS OF EPHEMEROPTERA
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Figs 18–24. Thraulobaetodes cumminsorum, exuviae of last instar larva spread on slide (Figs 18, 19, 21 and 22 on the same scale). 18 – abdominal terga I–IX; 19 – left half of pronotum and mesonotum; 20 – part of pronotum, enlarged; 21 – hind leg; 22 – head of male larva; 23 – abdominal tergum IV; 24 – paraprocts.