CLADOENDESIS OF EPHEMEROPTERA
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Fig. 66–69. Larvae of Procloeon (Securiops) macafertiorum. 66–68 – larval exuviae (with same magnification): 66 – abdominal terga and sterna; 67 – thoracic sterna, pleura, halves of metanotum with hind protoptera and right legs (arrows show hind protoptera); 68 – half of pronotum and mesonotum; 69 – last instar male larva.