Author: López-Fernández, Taphorn B. & Liverpool, 2012
Comments: Abundant in the entire upper Mazaruni River basin, and especially in tributaries with rocky substrates and rich in rapids.  Collected from black water sites with fairly high transparency (0.55-1.0 m Secchi depth), none to relatively fast currents (0-0.6 m/s), temperature (21.7- 24.5°C), pH (4.4-4.8), dissolved oxygen (5.2- 9.3 mg/L) and very low conductivity (<10 µS). Ref. 91746).