Author: de Pinna & Zuanon, 2013
Comments: Collected during late afternoon at the peak of the southwestern Amazonian summer when rivers are at their lowest level.  The site was a marginal sand bank forming a small island.  Found in an area with moderate current (approx. 40 cm/sec), depths up to 35 cm, markedly warm water (30-33uC on the surface), horizontal transparency varied between 2.5 and 3.2 m and pH 6.5-7.0.