Author: Nielsen, 2013
Comments: The locality where the species occurs lies at the plateau area (316 m.a.s.l.), just southwest of Llanos de Mojos, which occupy much of the río Mamoré basin.  Water temperature at the surface of the pool was 31ºC, at 1 meter depth was 22ºC, and at the marginal area of the pool, at 15 cm depth, was 35ºC.  Only small specimens of <i>Trigonectes</i> sp. were collected syntopically in marginal areas, while specimens of <i>Simpsonichthys brousseaui</i> were collected in the deepest areas, at about 1 m deep. The pool has dark water, pH 6.8 and water hardness 80 ppm (Ref. 93219).