Acheilognathus deignani
Introduction '''''Acheilognathus deignani''''' is a species of freshwater ray-finned fish in the genus ''Acheilognathus''. It is endemic to northern Vietnam in the Mekong River. It grows to a maximum length of 5.2 cm.Named in honor of Herbert Girton Deignan (1906-1968), Associate Curator of Birds, U.S. National Museum, who collected the type specimen.
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