Tortopsis, Molineri, 2010

Pantoja, Gabriel M. & Salles, Frederico F., 2024, The nymph of Tortopsis canum Gonçalves, Da-Silva & Nessimian (Ephemeroptera: Polymitarcyidae), Zootaxa 5447 (2), pp. 289-294 : 291-292

Key to the known nymphs of South American species of Tortopsis

1 Wing pads completely whitish..................................................................... T. andaki

1’ Wing pads, at least, with costal margin pigmented........................................................... 2

2(1’) More than 8 stout spines on inner margin of tusk............................................................ 3

2’ Less than 3 stout spines on inner margin of tusk............................................................. 4

3(2) Wing pads with costal margin and some longitudinal veins shaded with gray ( Fig. 2F ); occiput with gray markings throughout the area ( Fig. 2B )............................................................................... T. canum

3 ’ Wing pads shaded gray only on costal margin (Fig 15 in Molineri, 2010); occiput without marks or with slightly marked sublateral pattern (Fig. 12 in Molineri, 2010).......................................................... T. sarae

4(2) Wing pads with costal margin and base of longitudinal veins slightly gray (similar to fig. 16 of Molineri 2008); outer margin of tusk with a subdistal indentation (Fig. 25 in Molineri et al. 2021); outer margin of tusks with 18 to 26 spines........ T. toro

4’ Wing pads shaded extensively with gray on costal margin and longitudinal veins (Fig. 14 in Molineri, 2008); outer margin of tusk with smoother outline, without a subdistal indentation (Fig. 96 in Molineri 2010); outer margin of tusks with around 30 spines................................................................................. T. obscuripennis

Figures

FIGURE 2. Tortopsis canum, nymph: A, general view, dorsal; B, head, dorsal view; C, general view, ventral; D, head, lateral view; E, base of antennae and anterolateral projection, dorsal view; F, Fore wing pad, dorsal view. Abbreviations: s=scape, a=anterolateral spine.