brevimanus, Tetragonopterus Günther [A.] 1864:325 [Catalogue of the fishes in the British Museum v. 5; ref. 1974] Río San Gerónimo, Baja Verapaz, Guatemala. Lectotype: BMNH 1864.1.26.388. Paralectotypes: BMNH 1864.1.24.177 (3), BMNH 2016.9.13.3-4 (2). Lectotype selected by Schmitter-Soto 2017:1376 [ref. 35414]? •Synonym of Astyanax mexicanus (De Filippi 1853) -- (Buckup in Reis et al. 2003:111 [ref. 27061]). •Valid as Astyanax brevimanus (Günther 1864) -- (Schmitter-Soto 2017:1373 [ref. 35414], López-Segovia et al. 2020:110 [ref. 38151], Page et al. 2023:76 [ref. 40505]). Current status: Valid as Astyanax brevimanus (Günther 1864). Characidae: Stethaprioninae. Distribution: Southern North America, Middle America: Highlands of eastern Oaxaca and Chiapas (Mexico), south and east to Quiché and Baja Verapaz (Guatemala). Habitat: freshwater.