CLADOENDESIS OF EPHEMEROPTERA
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Fig. 571–574. Centroptella (Chopralla) rufostriata sp. n. 571 – subimaginal gonostyli crumpled under larval cuticle; 572 – genitalia (holotype; left gonostylar and gonovectal muscles not shown); 573 – their subimaginal exuviae; 574 – penial bridge. Abbreviations: gd – gonoduct; gs1–gs3 – segments of gonostyli; gv – gonovectis; 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; pb – median projection of penial bridge; pgs – larval protogonostylus; usg – unistyliger.