Author: (Castelnau, 1855)
Remark: Redescription by Kullander & Silfvergrip (1991: 424), with bibliography, diagnosis, description, distribution, and illustrations.
Comments: The collection area was described by Werner (1990:55-58) as a small stream south of Sao Jose do Xingu (NRM 14605) -  a narrow blackwater creek widening at the collecting site and in places 1 m deep; the bottom substrate was sand and mud in part with dense stands of aquatic plants; temperature was 22°C, pH 5.5, conductivity 5 μS.  Specimens were taken from quiet shore areas with reed and grass (Ref. 86444).