Author: Eigenmann, 1909
Remark: The most recent reference to distribution is by Weitzman & Weitzman (1982), but due to a printer’s error Fig. 22.10 provides the correct distribution for <i>Nannostomus trifasciatus</i>, not Fig. 22.11. The most recent systematic description by Weitzman (1966). Weitzman et al. (2001) most recently discussed the geographical forms of this species.including a newly discovered form from Peru called the coral red pencilfish.
Comments: Aquarium keeping:  in groups of 5 or more individuals; minimum aquarium size 60 cm (Ref. 51539).