CLADOENDESIS OF EPHEMEROPTERA
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Figs 49–56. Larva of Procloeon (Oculogaster) niger (holotype): 49–50 – labrum with focus on ventral and dorsal sides; 51–52 – left and right mandibles; 53–54 – maxilla (ds1–ds3 – dentisetae); 55–56 – labium with focus on dorsal and ventral sides.