CLADOENDESIS OF EPHEMEROPTERA
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Fig. 439–448. Centroptella (Chopralla) ceylonensis, mandibles. 439–440 – left mandible, dorsal and median view; 441–442 – left and right mandibles of penultimolarva before molt to ultimolarva (with mandibles of next instar inside); 443–444 – the same, another specimen; 445–448 – right prostheca of different species. Abbreviations: in1–in4 – denticles of incisor; kd1–kd3 – denticles of kinetodontium; o-v.d – outer-ventral denticle of incisor; prs – prostheca.