FIGURE 1 in Egg morphology update based on new chorionic data of Potamanthus luteus (Linnaeus), Ephemera danica Müller and Oligoneuriella rhenana (Imhoff) (Insecta, Ephemeroptera) obtained by scanning electron microscopy

FIGURE 1. Egg morphology of Potamanthus luteus: A, General shape of egg with conical polar caps (scale bar = 50 µm). B, General shape of eggs by light microscope, showing flat and conical polar caps and many lateral attachment structures (40x). C, Flat polar cap form (scale bar = 10 µm). D, Fiber-coils with terminal fibers cluster coiled (scale bar = 5 µm). E, Fiber-coils with terminal fibers cluster uncoiled (scale bar = 10 µm).