This taxon is Not Recognised as a species by BirdLife International.
Scytalopus magellanicus (Sibley and Monroe 1990, 1993) has been split into S. magellanicus, S. griseicollis, S. fuscicauda, S. altirostris, S. affinis, S. acutirostris, S. urubambae, S. simonsi, S. zimmeri, S. fuscus and S. canus following SACC (2005). Scytalopus canus has been split into S. canus and S. opacus following SACC (2010).
BirdLife International (2016) Species factsheet: Scytalopus canus. Downloaded from http://www.birdlife.org on 04/12/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 04/12/2016.