CLADOENDESIS OF EPHEMEROPTERA
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Fig. 98–99. Centroptella (Centroptella) femorata sp. n. (holotype). 98 – genitalia; 99 – their subimaginal exuviae. Abbreviations: gs1–gs3 – segments of gonostyli; m.IX-X – base of intersegmental muscle; m.gs – gonostylar muscle; m.gv.d – dorsal muscle of gonovectis; m.gv.v – ventral muscle of gonovectis; m.sg – styligeral muscle; usg – unistyliger.