FIGURES 73–76 in Redescription of the subgenus Rhithrogeniella Ulmer 1939 (Ephemeroptera, Heptageniidae, genus Ecdyonurus) based on reared specimens from India and Thailand

FIGURES 73–76. Ecdyonurus (Rhithrogeniella) ornatus, development of penis. 73–74, imaginal penis and its subimaginal exuviae with minute points of titillators; 75, subimaginal penis extracted from mature larva, with imaginal titillators developing under subimaginal cuticle; 76, subimaginal penis extracted from mature larva, without tissues under subimaginal titillators (73–74, 76, from Pai; 75, from Kodaikanal. Abbreviations: tit.i, imaginal titillator; tit.s, subimaginal titillator).