| 總結: | Macrobrachium olfersii (Wiegmann, 1836), popularly known as Pitu, Bristled River Shrimp and Buchura River Prawn, is a freshwater shrimp species widespread along the eastern coasts of the Americas. The species can be found from the southeastern United States, where the prawns were introduced (Holthuis and Provenzano, 1970), southwards to Rio Grande do Sul (Brazil), including numerous records in Mexico, Nicaragua, Costa Rica, Panama, Colombia, Venezuela, Guyana and Suriname (Holthuis, 1952; Williams, 1984; Melo, 2003; Valencia and Campos, 2007).
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