attenuatum, Chirostoma Meek [S. E.] 1902:112, Pl. 27 upper [Field Columbian Museum, Zoölogical Series v. 3 (no. 6); ref. 2957] Patzcuaro Lake at Patzcuaro, Michoacan, Mexico. Holotype: FMNH 3631. Paratypes: ANSP 90850 (2); FMNH 3632 (12); CAS-SU 21436 (2); UMMZ 162467 [ex FMNH 3632] (3), 187671 (2); USNM 55782 (2). Type catalog: Ibarra & Stewart 1987:23 [ref. 12367], Böhlke 1984:23 [ref. 13621]. •Valid as Menidia attenuata (Meek 1902) -- (Miller 2006:192 [ref. 28615]). •Valid as Chirostoma attenuatum Meek 1902 -- (Espinosa Pérez et al. 1993:59 [ref. 22290], Dyer in Reis et al. 2003:518 [ref. 27061], Nelson et al. 2004:98 [ref. 27807], Scharpf 2007:7 [ref. 30398] with subspecies, Page et al. 2013:100 [ref. 32708], Betancourt-Resendes et al. 2018:330 [ref. 37172], Page et al. 2023:139 [ref. 40505]). Current status: Valid as Chirostoma attenuatum Meek 1902. Atherinopsidae: Menidiinae. Distribution: Southern North America: Lake Pátzcuro, Lerma River basin (Michoacan, Mexico). Habitat: freshwater.