Temporal range: 28–0Ma Late Oligocene to Present
|Delta smelt, Hypomesus transpacificus|
T. N. Gill, 1862
There are currently five recognized species in this genus: 
- Hypomesus japonicus (Brevoort, 1856)
- Hypomesus nipponensis McAllister, 1963 (Japanese smelt)
- Hypomesus olidus (Pallas, 1814) (Pond smelt)
- Hypomesus pretiosus (Girard, 1854) (Surf smelt)
- Hypomesus transpacificus McAllister, 1963 (Delta smelt)
The pond smelt H. olidus is widespread across northeastern Asia, Alaska, and northwestern Canada, while the Delta smelt H. transpacificus is an endangered species of the Sacramento Delta in California. H. chishimaensis was at one time thought to be a separate species, but has since been identified as a population of H. nipponensis.
|Phylogeny of the genus Hypomesus including H. chishimaensis under H. nipponensis.|
- Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology 364: 560. Retrieved 2007-12-25.
- Froese, Rainer, and Daniel Pauly, eds. (2012). Species of Hypomesus in FishBase. February 2012 version.
- http://www.highbeam.com/doc/1P3-1235784021.html Are Hypomesus chishimaensis and H. nipponensis (Osmeridae) Distinct Species?
- Evolutionary and biogeographical patterns within the smelt genus Hypomesus in the North Pacific Ocean, Katriina L. Ilves and Eric B. Taylor, Journal of Biogeography, (2008) 35, 48–64
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