CLADOENDESIS OF EPHEMEROPTERA
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Figs 1–13. Choroterpes (Dilatognathus) cataractae. 1 – apices of penes of male imago. 2–5 – key for determination of four last larval instars: pronotum and mesonotum of L_n-3, L_n-2, L_n-1 and L_n. 6–13 – apex of maxilla in last four larval instars (ventral view; tusk, ventro-apical flange, dentiseta and vestiges of pectinate ventral setae are shown, other setae not shown): 6–8 – male; 9–13 – female; 6 and 9 – ultimolarva (L_n); 7 and 10 – penultimolarva (L_n-1); 8 and 11 – pen-penultimolarva (L_n-2); 12 – dentiseta of female pen-penultimolarva, another specimen; 13 – pen-pen-penultimolarva (L_n-3).