CLADOENDESIS OF EPHEMEROPTERA
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Fig. 626–631. Centroptella (Chopralla) pusilla, larva. 626 – abdominal tergum IX; 627 – subimaginal gonostyli crumpled under larval cuticle; 628 – labrum; 629 – labrum according to original description (Müller-Liebenau 1984a: fig. 5a) with presumable basal margin added with red line; 630 – paraprocts; 631 – posterior margin of abdominal tergum X. Abbreviations: gs1–gs3 – segments of gonostyli; pgs – larval protogonostylus; usg – unistyliger.