Original description as Tetragonopterus angustifrons:
ZooBank:E26798C1-4C98-44D4-960E-D3EF12A6F0F1.
- Regan, Charles Tate. 1906. "Pisces". Biologia Centrali-Americana. 1-203. ISBN: 9781333207144 (ffm00277)
Conservation: Astyanax angustifrons is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (LC) least concern (2018).