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.
Diet information for Platyurosternarchus Crypticus is currently being compiled.
Reproduction data for Platyurosternarchus Crypticus is currently being compiled.
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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