Morphological characters used in phylogenetic analyses. A Guaranyperla guapiara, nymphal vesicular-like setae (left: antennae; right: pronotum); B Paragripopteryx klapaleki, nymphal claviform-like setae; C Tupiperla robusta, nymphal hook-like setae; D Notoperla magnaspina, head, pronotum, and prolegs in dorsal view, with details of the procoxal process and dense setae on the femur; E Gripopteryx liana, nymph habitus in lateral view, with detail of the pronotum processes; F Guaranyperla guapiara, head and pronotum, with details of the paranota and anterior projection; G–K Gripopterygidae sp., shape of the metanotum mid-distal margin; L Limnoperla jaffueli, pilosity on the nynphal hind femur; M, N Gripopterygidae sp., details of the tarsal setae and spur; O Gripopteryx cancellata, nymph habitus in lateral view, with details of the abdominal processes and anal gills; P Gripopteryx liana, nymph end of abdomen, with detail of the paraproct shape; Q Tupiperla sp., detail of the femoral spine; R Tupiperla furcata, sp. nov., hindleg with femoral spine; S Guaranyperla barbosai, terminalia in dorsal view; T, U Ericiataperla puerilis, terminalia in dorsal and lateral views; V Guaranyperla barbosai, terminalia in lateral view. (Figs A, B, E, O, P modified from Froehlich (1969, 1990, 1993, 2001); Fig. L modified from McLellan and Zwick (2007); Figs T–U modified from Pessacq et al. (2020)).