Dayuma was born sometime in the early 1930s in the rainforest of eastern Ecuador.

It is known from eastern Ecuador, Peru and Bolivia.

C. s. nigriceps occurs in eastern Ecuador and northeastern Peru.

So far everything on my trip to the headwaters of the Amazon in eastern Ecuador had been a surprise.

It occurs widely in wet forest in eastern Ecuador at elevations ranging from 400 to 1,100 meters.

It is known from Amazonian rainforest of eastern Ecuador.

It is found from eastern Ecuador to the Guyanas.

It is also found in eastern Ecuador.

The species is found in all of eastern Amazonian Ecuador.

It was described by Monné in 1984, and is known from eastern Ecuador.