FIGURES 563–568 in Systematic position of Thraulodes Ulmer 1920 (Ephemeroptera: Leptophlebiidae) and descriptions of new and little-known species

FIGURES 563–568. Thraulodes alboniger sp. n. 563, labrum; 564–565 and 566–567, male imaginal genitalia of two different specimens; 568, fragment of imaginal caudalius (563, 566–568, holotype). Abbreviations: anter.r., anterior transverse setal row; poster.r., posterior transverse setal row; other arrow show six sensilla separating five denticles.