FIGURE 4 in Description of nymph of Brasilocaenis atawallpa Lima, Molineri, Vieira, Pinheiro & Salles, 2019 (Ephemeroptera: Caenidae) and notes on its taxonomic status

FIGURE 4. Male genitalia of Brasilocaenis atawallpa. A, Genitalia of male imago, ventral view (modified from Lima et al. 2019); B, sternum IX of mature male nymph, ventral view (internal structures shown by interrupted lines, penis not shown). SP = Styliger plate; F = forceps. (Scale: Figs 4A, B = 0.1 mm).