Astyanax nasutus Meek 1907 . Managua Tetra; Sardina, Sardina Lagunera, Sardinilla, Sabalete, Sardinita, Plateada, Tetra, Sardina del Lago Managua

Vouchers: FMNH 5908 (14), 5909 (1) and 5910 (1). Distribution: Central America; endemic to the Lago Xolotlán (Managua), Nicaragua; (Nicaragua) LN (Atlantic); 30–31 masl; Pri, Pot. Occurrence and conservation status: Nat, End; DD (2020), population trend unknown. Literature: Meek (1907: 108; brief description, including an identification key, and information on distribution and ecology), Astorqui (1975: 85, as Hemybrycon sp.— misidentification; brief description, including illustrations and an identification key, and information on distribution and ecology), Villa (1982: 102; detailed description, including illustrations and an identification key, and information on distribution and ecology) and Schmitter-Soto (2017: 62; redescription, including illustrations and an identification key, and information on distribution, with a map, and ecology).