CLADOENDESIS OF EPHEMEROPTERA
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Figs 498–507. Thraulodes nigripes. 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).