Brachystylodes rotundatus is distinguished from B. pilosus, the other species of Brachystylodes with similar distribution in northwestern Argentina, because the elytral base is almost straight, the humeri more reduced and rounded, and the front femora without three denticles on the inner face.
Host plants
Unknown.
It is associated with vegetation of the Yungas biogeographic province.
References
KUSCHEL G. 1945. Aportes entomológicos I (Curculionidae). Anales de la Sociedad Científica Argentina 139: 120- 136.