FIGURES 42–52. Larvae. 42–50 in Redescription of the subgenus Rhithrogeniella Ulmer 1939 (Ephemeroptera, Heptageniidae, genus Ecdyonurus) based on reared specimens from India and Thailand

FIGURES 42–52. Larvae. 42–50, Ecdyonurus (Rhithrogeniella) ornatus, larval exuviae: 42–44, specimen from Agumbe (India), posterior margins of abdominal terga I, VIII and X; 45, specimen from Pai (Thailand), posterior margins of abdominal tergum VI; 46–48, cercus of specimen from Agumbe: 46, proximal portion; 47, middle portion in median-ventral view, to show bases of primary swimming setae on inner (median) side; 48, the same portion with focus on lateral-dorsal side, to show bases of secondary swimming setae on outer (lateral) side; 49–50, cercus of specimen from Kodaikanal (India). 51–52, Ecdyonurus (Rhithrogeniella) joernensis (Russia, Orenburg province, Tashla, 16.VIII.1986, coll. N. Kluge): two portions of cercus, dorsal view.