科研之友
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摘要
the rio negro is one of the biggest rio amazonas tributaries. few molluscs have been registered to that river yet, represented only by gastropods. it is reported the occurrence of the exotic bivalve mollusc corbicula fluminea in left bank margin of rio negro, lago do tup谷 and catalˋo - right bank margin of rio negro, all localities in the municipality of manaus, brazil. the species is recorded by a collection of shells and specimens alive. this is the first occurrence of c. fluminea in the amazon state and central amazon.
