FIGURES 23–29. Indobaetis costai. 23–25 in Systematics of Indobaetis Müller-Liebenau & Morihara 1982, and related implications for some other Baetidae genera (Ephemeroptera)

FIGURES 23–29. Indobaetis costai. 23–25, male imago: 23, wing; 24, genitals (ventral view, muscles of middle and left parts shown by interrupted lines); 25, head and dorsal outline of pronotum and anteronotal protuberance, lateral view. 26, head of female imago, dorsal view. 27, subimaginal exuviae of right unistyliger and gonostylus; 28, subimaginal genitals developing under larval cuticle; 29, the same at earlier phase. Abbreviations: gs1–gs3, 1st–3rd segments of gonostylus; m.s, median sternostyligeral muscle; m.IX–X, intersegmental ventral muscles going from base of 9th abdominal segment to base of 10th abdominal segment; us, unistyliger.