This species has four subspecies recognized.
Amaurospiza moesta occurs in south-east Brazil, east Paraguay and north-east Argentina (Storer 1989, Ridgely and Tudor 1989, Brooks et al. 1993, Sick 1993, Lowen et al. 1996, Pacheco et al. 2007). In Brazil, it is relatively common in the Serra do Mar and Parana (F. C. Straube in litt. 1991), but very local elsewhere (Ridgely and Tudor 1989). In Argentina, it is locally common, especially in the highlands (Benstead et al. 1993, J.Mazar Barnett in litt. 1999), but it is rare in Paraguay, even at the few sites where it has been recorded (Storer 1989, Brooks et al. 1993, Lowen et al. 1996, Madroo and Esquivel 1997). Source: eol.org/pages/1050278/overview
Known in Brazil as "negrinho-do-mato".