Besides the Orinoco system, which other major river system is sometimes cited as part of the complementary distribution range for *Pristella maxillaris*?
Answer
Amazon river system
The exact description of the X-Ray Tetra's wild range can sometimes vary between sources. While the Orinoco and La Plata systems are firmly established as their home range, some other sources utilize a description that complements this by citing the Amazon river system alongside the Orinoco. The text suggests these differing descriptions are likely complementary, reflecting the complex hydrological connections and tributary overlaps that characterize the distribution spread across the South American continent.

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