Key to the males of Brasineura species

1. Hindwing M two-branched; external parameres distally not forked.............................................. 2

-. Hindwing M three to four-branched; external parameres distally forked........................................... 3

2. Antero-mesal pair of the endophallic sclerite, sinuous, with a row of tiny spines in the middle, and distally acuminate; external parameres distally with a small area more sclerotized, almost triangular....................................................................................................... Brasineura diamantina Silva-Neto & García Aldrete

-. Antero-mesal pair of the endophallic sclerite, bow-shaped, without spines and distally not acuminate; external parameres distally with an acuminate projection, curved outwards........................................ Brasineura jiboia sp.n.

3. Hindwing M three–branched; phallobase with numerous small tripartite structures, similar to spines; antero-mesal pair of the endophallic sclerite short, stout and arising in the middle of the phallosome................... Brasineura spinosa sp.n.

-. Hindwing M four–branched; phallobase without structures similar to spines; antero-mesal pair of the endophallic sclerite, long, slender and arising in the region of the phallobase....................................................... 4

4. Hypandrium with a projection in the middle; external parameres distally with three acuminate projections; paraprocts elongate, distally curved outward.............................. .. Brasineura serranortensis Silva-Neto, García Aldrete & Rafael

-. Hypandrium without a projection in the middle; external parameres distally with two acuminate projections; paraprocts not elongate, distally not curved................................... Brasineura troglophilica Silva-Neto & García Aldrete