FIGURES 53–68 in Redescription of the subgenus Rhithrogeniella Ulmer 1939 (Ephemeroptera, Heptageniidae, genus Ecdyonurus) based on reared specimens from India and Thailand

FIGURES 53–68. Ecdyonurus (Rhithrogeniella) ornatus. 53–56, male abdomina to show hypodermal coloration: 53, subimago extracted from mature larva; 54–55, imagines; 56, subimago; 57, male imago; 58–60, fore and hind wings; 61, hind wing; 62– 63, fore and middle legs of male imago; 64, male imago with subimaginal exuviae; 65, 1st tarsal segment of male subimaginal exuviae; 66–67, exuviae of half of subimaginal mesonotum; 68, cercus of male imago (53, 54, 57–60, 66, from Pai; 56, 61, 67, from Kwai-Yai; 56, 61, 67, from Agumbe; 64–65, from Kodaikanal). Abbreviations: cz.a, anterior chromozone; cz.lp, lateroparapsidal chromozone; cz.ps, chromozone of parascutellum.