Brontostoma colossus (Distant, 1902)
https://biodar.unlp.edu.ar/cimicomorpha/en/info/20319.html
(Fig. 10C)
Material studied: 2♂, 25.007460 S- 60.946675 W, 2-9/XI/2019, L. Damer col., M.C. Melo det. (MLP). Observation: https://www.argentinat.org/observations/98292549