FIGURES 20–21 in The concept of Compsoneuria Eaton, 1881 revisited in light of historical and new material from the Sunda Islands (Ephemeroptera: Heptageniidae: Ecdyonurinae)

FIGURES 20–21. SEM pictures of eggs extracted from a female imago (Fig. 20) and from mature nymph (Fig. 21) of Compsoneuria spectabilis. Fig. 20: Female imago from Java, Buitenzorg, XI. 1919, Karny leg; Fig. 21: Female nymph (UN4) from Sumatra, Ombilin River, Talawi, 8.XI.2011, Balke leg.; a: egg in toto; b: detail of the pole; c: micropyle and detail of the chorionic structure.