Coastal eastern Brazil (Paraíba south to Rio de Janeiro). Considered by some authors to be a subspecies of White-flanked Antwren (Myrmotherula axillaris).
 
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Silvery-flanked Antwren (Myrmotherula luctuosa) [XC472838]
by id from Esta\u00e7\u00e3o Ecol\u00f3gica Estadual de Guaxindiba, S\u00e3o Francisco de Itabapoana, Rio de Janeiro, Brazil (call, flight call)
Silvery-flanked Antwren (Myrmotherula luctuosa) [XC345909]
by Caio Brito from Reserva Ecol\u00f3gica de Guapia\u00e7u, RJ, Brazil (song)
Subspecies
Considered by some authors to be a subspecies of White-flanked Antwren (Myrmotherula axillaris).