FIGURES 31–49. Caenis dominguezi, nymph. 31 in South American Caenis Stephens (Ephemeroptera, Caenidae), new species and stage descriptions

FIGURES 31–49. Caenis dominguezi, nymph. 31, labrum and detail of anteromedian emargination, d.v.; 32, setae on dorsum of hind femora; 33, seta on hind tibiae; 34, setae of fore femoral dorso-transversal row; 35, pronotum, d.v.; 36, fore leg; 37, middle leg; 38, hind leg; 39, middle coxa; 40, hind coxa; 41, foreclaw; 42, middle claw; 43, hind claw; 44, operculate gill and detail of dorsal surface; 45–46, microtrichia of submarginal ventral row of operculate gill; 47, abdominal gill III; 48, abdominal segment II and operculate gill, l.v.; 49, sternum IX of a male nymph. Abrevviations: OG=operculate gill; T2= second abdominal tergum.