Three disjunct populations are known in the middle Solimões River region of Amazonas, Brazil. Their coats vary by river locality; specimens from the Jacurapá channel area have reddish-orange backs and limbs that contrast with a whitish nape.
A 2022 specimen comparison found different coat patterns among the three populations. At the Jacurapá type locality, whitish nape hairs contrast with reddish-orange mid-back, rump, trunk sides, and limbs; in some specimens the white nape hairs grade into light orange on the mantle. Jutaí left-bank specimens have whitish nape hairs extending onto the mantle, followed by a reddish-chestnut saddle; the mid-back, rump, trunk sides, and limbs are reddish-chestnut. In Auati-Paraná specimens, the trunk sides and limbs are reddish-chestnut, while pale whitish to buff hairs cover the back from nape to tail in an adult male; in the one female examined, this pale area reached only the saddle.
Field ecology has not been studied. At the Jacurapá channel locality, records place the species only in flooded forest (várzea) between the channel and the Solimões; local residents supported that distribution. The habitat used by the other two populations is not established in the sources reviewed.
An extinction-risk assessment has not been added yet.