CLADOENDESIS OF EPHEMEROPTERA
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Figs 164–171. Epeorus (Caucasiron) guttatus. 164 – imaginal claws; 165 – penis of subimago (developing imaginal penis shown by interrupted lines); 166 – median margin of subimaginal gonostylus pedestal (developing imaginal margin shown by interrupted line); 167 – styliger and gonostylus of subimago; 168 – imaginal genitals of the same individual, ventral view; 169 – tergalius II; 170 – larval abdominal sterna I and II with tergalii; 171 – scheme of color pattern on abdominal sternum of male imago (at left half, muscles attached to medio-anterior and medio-posterior myo-sigilla are shown; other sternal muscles not shown) (see Fig. 161). Abbreviations: g – nerve ganglion; ma – medio-anterior myo-sigillum; mp – medio-posterior myo-sigillum.