Naming
Etymologically, the generic name "Pterygoplichthys" is constructed with three words of the Greek language, where: "pterygion" is the diminutive of "pteryx" that means 'fin', "hoplon" is 'weapon', and "ichthys" is 'fish'. The specific term "ambrosettii" honors the surname of Argentine naturalist Juan Bautista Ambrosetti.Distribution
This species is distributed in the Río Plata basin, in the Paraguay, Middle Paraná, Bermejo, and Uruguay rivers, in the countries of Paraguay, Bolivia, the north/northeast of Argentina, and the west of Uruguay. It is a typical species of the Paraná lower freshwater ecoregion.Evolution
"Pterygoplichthys anisitsi" was described in 1903 by the German-American ichthyologist Carl H. Eigenmann along with Clarence Hamilton Kennedy. These scientists were originally credited more so with its discovery since the description made by Holmberg went unnoticed, so in 1992 C. Webber passed the latter to the category of "nomen oblitum". However, the epithet of "P. ambrosettii" had been cited as the valid name for this fish by Isaäc Isbrüker in 1980. Other authors began to agree, so in 2007 Carl J. Ferraris Jr. determined that, being the oldest available name, it corresponds to being the senior synonym, becoming "P. anisitsi" to be its minor synonym.References:
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