Southern Brazil from northern Sío Paulo (southern bank of R Paraíba do Sul) south to southern Rio Grande do Sul, also adjacent south-eastern Paraguay (Alto Paraná), north-eastern Argentina (Misiones, north-eastern Corrientes) and north-eastern Uruguay.
 
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is unknown (2010).
Scalloped Woodcreeper (Lepidocolaptes falcinellus) [XC308411]
by Caio Brito from Praia Grande, Praia Grande, Santa Catarina, Brazil (song)
Scalloped Woodcreeper (Lepidocolaptes falcinellus) [XC556384]
by Dante Buzzetti from PE da Cantareira - N\u00facleo Cabu\u00e7u, Brazil (chamado)
Subspecies
No subspecies.
Lepidocolaptes squamatus (Sibley and Monroe 1990, 1993) has been split into Scaled Woodcreeper (Lepidocolaptes squamatus) and Scalloped Woodcreeper (Lepidocolaptes falcinellus) following SACC (2005).
Sister-species to Scaled Woodcreeper (Lepidocolaptes squamatus) and previously regarded as conspecific, but three plumage characters (crown pattern, and coloration of back and of tail) and measurements differ significantly between populations on opposite sides of R Paraíba do Sul, in northern Sío Paulo. The depression associated with this river also represents a boundary for several other well-marked taxa.