FIGURES 498–507 in Systematic position of Thraulodes Ulmer 1920 (Ephemeroptera: Leptophlebiidae) and descriptions of new and little-known species

FIGURES 498–507. Thraulodes nigripes sp. n. 498, larval protogonostyli and protopenis; 499, subimaginal styliger and gonostyli extracted from larva; 500–501, subimaginal penis inside larval protopenis in ventral and dorsal view; 502, larval protogonostyli with subimaginal gonostyli and styliger at earlier stage of development; 503–506, tergalii I, III, VI and VII (498–501, 503–506, holotype).