Redescription and lectotype designation of the endemic South African mayfly Lestagella penicillata (Barnard, 1932) (Ephemeroptera: Teloganodidae) Author Pereira-Da-Conceicoa, Lyndall L. Author Barber-James, Helen M. text Zootaxa 2013 3750 5 450 464 journal article 10.11646/zootaxa.3750.5.2 5e92b0b1-7e7c-4e26-a949-40de1b62ea5e 1175-5326 220782 06F7524F-2ABB-412B-A9FA-91B8A059196E Lestagella Demoulin, 1970 Lestagella Demoulin 1970: 130 , Figure 15 (a–r); McCafferty & Wang 1997: 403–405, Figures 7 , 16 , 25, 34, 43, 52, 61, 68, 72, 86. Type species: Lithogloea penicillata by original designation Diagnosis. Nymph . Lestagella nymphs can be distinguished from other Teloganodidae by the following combination of characters: a well-developed marginal fringe of setae on the head ( Fig. 2 c–e), spatulate setae on margin of prothorax, simple filamentous gills present on abdominal segment I, lamellate gills on segments II–IV with fully operculate gill on segment II, tibia lined with a single row of setae on the antero-dorsal surface, tarsal claw with well-developed subapical denticle, other denticles small. Abdominal segments with moderately developed posterolateral processes that are slightly separated from the base of the following segment, three caudal filaments with lateral, hair-like setae and a subequal median caudal filament. Imago . Lestagella adults can be distinguished from other Teloganodidae by the combination of the following characters: three caudal filaments, forewings with a relatively short, detached iMP and the presence of gill socket vestiges on abdominal segments II–IV.