Girardinichthys viviparus (Bustamante, 1837)

Figs 1, 2, 3

Material collected.

Mexico: CIFI 1505, 21 ind., 20.9–36.5 mm SL, Atlangatepec Lake, Atlangatepec municipality, Atoyac River basin, 19 ° 32 ' 58.2 " N, 98 ° 10 ' 32.5 " W, 18 Feb 2019, Col. Perez-Díaz, J. ; CIFI 1708, 31 ind., 21.5–48.2 mm SL, Tochac Lake, borderline of the municipality of Benito Juárez, Tlaxcala and San Antonio Atocha, Hidalgo, Moctezuma River basin, 19 ° 36 ' 58.3 " N, 98 ° 26 ' 46.2 " W, 20 Jun 2019, Col. Pérez-Díaz, J., Perez-Díaz, Y. A., Hernández-Arellano, T., López-Segovia, E. ; CIFI 1598, 13 ind., 18.6–53.4 mm SL, Tenexac reservoir, Terrenate municipality, Tecolutla River basin, 19 ° 30 ' 03.6 " N, 97 ° 58 ' 50.6 " W, 7 Mar 2020, Col. Pérez-Huerta, J. A., Pérez-Díaz, J., López-Segovia, E. ; CIFI 1709, 75 ind., 21.6–29.2 mm SL, Tenexac reservoir, Terrenate municipality, Tecolutla River basin, 19 ° 30 ' 05.5 " N, 97 ° 58 ' 51.4 " W, 18. Jul 2020, Col. Pérez-Díaz, J., Hernández-Arellano, T., Del Moral-Flores, L. F., López-Segovia, E. ; CIFI 1710, 13 ind., 20.9–29.52 mm SL, " Jagüey ", near Atlangatepec Lake, Loma Bonita, Atlangatepec municipality, Atoyac River basin, 19 ° 31 ' 53.6 " N, 98 ° 12 ' 56.8 " W, 19 Jul 2020, Col. Pérez-Díaz, J., Hernández-Arellano, T., Del Moral-Flores, L. F., López-Segovia, E. ; CIFI 1711, 7 ind., 17.9–31.2 mm SL, Atlangatepec Lake, Atlangatepec municipality, Atoyac River basin, 19 ° 33 ' 24.6 " N, 98 ° 12 ' 08.9 " W, 19 Jul 2020, Col. Pérez-Díaz, J., Hernández-Arellano, T., Del Moral-Flores, L. F., López-Segovia, E.