CLADOENDESIS OF EPHEMEROPTERA
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Fig. 106–115. Procloeon (Securiops) primasia, larval exuviae. 106–108 – dark individual (female); 109–115 – light individual (male); 106, 115 – abdominal terga and sterna; 107, 110 – half of pronotum and mesonotum; 108, 111 – left thoracic pleura and half of metanotum; 109 – part of head; 112–114 – fore, middle and hind legs.