It is found in the Amazon Basin in Brazil, Colombia, Ecuador, Peru, and Venezuela.

A chocolate-brown band runs from across the snout through the eye and upper tympanum, above arm insertion, and to the groin.

The male or the female transports the tadpoles to a pond or small stream.

[4] Allobates marchesianus occurs in secondary and old-growth tropical rainforests at elevations up to 800 m (2,600 ft) above sea level.

[1] It is a common species but its habitat is threatened by clear cutting, logging, forest conversion, and fires.