Member of the putative S. maculirostris group. Closely related to S. maculirostris, and sometimes treated as conspecific. Proposed races hellmayri (NC Brazil) and baturitensis (NE Brazil) appear to represent clinal variation of trivial nature, size decreasing from W to E#R; either or both of these sometimes placed in S. maculirostris. Monotypic.
C & E Brazil S of Amazon (from R Madeira E to Maranhão and N Ceará), S to E Bolivia (R Mamoré, E Beni and NE Santa Cruz) and C Mato Grosso, there reaching tributaries of upper R Paraguay.
Food and feeding
Status and conservation
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