Austrolebias nigripinnis:

Paraguay: UMMZ 207493, 30, 24.1-26.9 mm SL; UMMZ 207494, 4, 23.1-32.5 mm SL; Argentina: ZVC-P 718 3, 24.5-28.9 mm SL; Uruguay: ZVC-P 848, 6, 24.6-29.9 mm SL (2C&S) .