The Nans indefessus lives in the benthopelagic, freshwater environment.
Nans indefessus Mirande, Aguilera & Azpelicueta, 2004 was described as a new genus and species from the upper Río Bermejo basin, Northwestern Argentina. According to Naeve (1940) the generic name Nans is preoccupied by an annelid (Chamberlin, 1919: 125). More