Sparsorythus sescarorum sp. n., nymph. a 1 mm section of segment VII abdominal terga with small denticles and ribbon-shaped bristles b Fore femora transverse row of setae c hind femora irregularly scattered setae d gill VI e gill V. Scale bars: I – 1 mm (a); II – 0.1 mm (b, c); III – 0.25 mm (d, e).