The type locality, Moco-Moco Creek, is a small stream with usually clear water but turns muddy for several hours after heavy rainfalls. One specimen was collected from a forest stream with relatively clear water weakly stained in tannins over a gravel and cobble bottom covered with leaf and twig litter. Reported to occur in rapids and streams and regarded as a predator, presumably preys on invertebrates .
Physical description for Platyurosternarchus Crypticus is currently being compiled.
Behavioural data for Platyurosternarchus Crypticus is currently being reviewed.
Freshwater; benthopelagic. Tropical South America: upper portions of the Rio Branco system of the Amazon basin in northeastern Roraima, Brazil and in the easternmost portion of the Rupununi District, Guyana.
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