not a species from Argentina:
Peckoltia vittata (Steindachner, 1881)

published in:
Koerber, S. & C. Weber (2014):
The Hypostominae (Siluriformes: Loricariidae) of Argentina.
Ichthyological Contributions of PecesCriollos 29: 1-10

remarks (from publication):
The records of Peckoltia vittata from Argentina, all originally based on either Meinken (1937) or Rodriguez & Cuello (2005), represent juvenile H. latifrons.