Itaituba, Rio Tapajós, Brazil.
Long regarded as a weakly defined race of H. minor; however, revision of original series of specimens revealed presence of two separate species, and that name minimus referred to the species previously known as H. aenigma, which thereby became a junior synonym#R. Monotypic.
Scattered Amazonian localities in SE Ecuador (Kapawi), E Peru (near Iquitos, upper Ucayali#R), Brazil (NW Acre and Amazonas E to E Pará and S to Tocantins and Mato Grosso), and NE Bolivia (E Pando, E Beni, N Santa Cruz); suspected to occur widely across Amazonia where appropriate habitat exists.
Food and feeding
Status and conservation
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