Even at their highest diversity in Brazil's Mata Atlântica, the species are almost completely parapatric, in some cases like the Dusky-tailed and Scaled Antbird even to exclusive habitat preferences. Of course, the rampant deforestation in that region may obscure that there has been more overlap in the past. In any case, habitat fragments strongly tend to hold at most a single species.
D. devillei, the Striated Antbird, is a species of the southwestern quadrant of the Amazon Basin, and a disjunct population lives in north-western Ecuador and adjacent parts of Colombia. D. caudata, the Long-tailed Antbird, is a species of humid highlands, ranging through the Andes from western Bolivia to north-western Venezuela, with disjunct populations in the Sierra Nevada de Santa Marta, Serranía del Perijá and Venezuelan Coastal Range.