Author: Dunz & Schliewen, 2009
Comments: Type specimens collected on logs in areas of relatively rapid water movement; logs had a very rugged surface due to being partially decomposed by wood eating <i>Povilla</i> (Ephemeroptera) larvae; individuals were spaced singly and moved very rapidly around log surface, but always with close contact to it and never reaching out into the free water column; first ray of pelvic fin very thick, which is adaptation to cling on wood in strong current; mouth subinferior and blunt (Ref. 80507).