[1] The specific name brunoi was in honour of Dr Bruno Lobo, Professor and Director of the National Museum of Brazil (1915-1923).

The dorsal surface is pale brown or gray, with irregular dark markings.

[3] Bruno's casque-headed frog is endemic to the coastal region of southeastern Brazil, east of the Brazilian Highlands.

[1] Unlike poison dart frogs which merely secrete poison from their skin, this species is equipped with skull spines capable of injecting venom into other animals or human hands via headbutting, a tactic it shares with Corythomantis greeningi.

[4][5] The venom of A. brunoi is estimated to be 25 times as toxic as that of local fer-de-lance pit vipers.