first record from Argentina:
Xiphophorus hellerii Heckel, 1848

published in:
Terán, G.E., S. Koerber, J.C. Stazzonelli, G. Aguilera & J.M. Mirande (2022):
Any colour you like: new records of ornamental livebearers (Poeciliidae: Cyprinodontiformes) from freshwaters of Argentina.
Ichthyological Contributions of PecesCriollos 80: 1-8

abstract (from publication):
In this note we report the new findings of two species of ornamental poeciliids: Xiphophorus hellerii, first record for Argentina, and Poecilia reticulata, first record for the Salí River basin and the province of Tucumán, and the second record for Argentina. The swordtails show a very special color pattern and are without doubt individuals from an artificial aquarium strain, not found in natural populations.