CLADOENDESIS OF EPHEMEROPTERA
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Figs 130–133. Labiobaetis tenuicrinitus. 130 – subimaginal gonostyli folded under larval cuticle (1, 2, 3, segments of gonostylus); 131 – genitals of male imago (at right half, muscles shown by interrupted lines; places of attachment of median paraproctal muscles shown by dotted lines; 1, 2, 3, segments of gonostylus); 132 – larval claw; 133 – larval fore leg, dorsal view. Abbreviations: gv – gonovectis; pgs – protogonostylus (paired convexity on posterior margin of IX sternum of male larva); mIX-X, – areas of anterior attachment of median paraproctal muscles (i.e., muscles going from sternum IX to common base of paraprocts); pb – median projection of penial bridge; usg – unistyliger.