The genus Daphnia (Crustacea: Cladocera: Daphniidae) contains over 200 species of water fleas, many of which are in need of further taxonomic investigation (species inquirendae; marked with asterisks). The species are divided among three subgenera, with a number of species incertae sedis.
Subgenus Australodaphnia Colbourne, Wilson & Hebert, 2006 Daphnia occidentalis Benzie, 1986
Subgenus Ctenodaphnia Dybowski & Grochowski, 1895
Daphnia atkinsoni Baird, 1859 Daphnia australis (Sergeev & Williams, 1985) Daphnia barbata Weltner, 1898 Daphnia bolivari Richard, 1888 Daphnia brooksi Dodson, 1985 Daphnia carinata King, 1853 Daphnia cephalata King, 1853 Daphnia chevreuxi Richard, 1896 Daphnia chilensis (Hann, 1986) Daphnia coronata Sars, 1916 Daphnia dadayana Paggi, 1999 Daphnia deserti Gauthier, 1937 Daphnia dolichocephala Sars, 1895 Daphnia ephemeralis (Schwartz & Hebert, 1985) Daphnia exilis Herrick, 1895 Daphnia fusca Gurney, 1907 Daphnia gelida (Brady, 1918) Daphnia gibba Methuen, 1910 Daphnia gravis King, 1853* Daphnia hispanica Glagolev & Alonso, 1990 Daphnia inca Kořínek & Villalobos, 2003 Daphnia jollyi Petkovski, 1973 Daphnia longicephala Hebert, 1977* Daphnia magna Straus, 1820 Daphnia magniceps Herrick, 1884 Daphnia mediterranea Alonso, 1985 Daphnia menucoensis Paggi, 1996 Daphnia nivalis Hebert, 1977 Daphnia ornithocephala Birabén, 1953 Daphnia paggii Kotov, Sinev & Berrios, 2010 Daphnia projecta Hebert, 1977* Daphnia pusilla (Serventy, 1929) Daphnia quadrangula (Sergeev, 1990) Daphnia queenslandensis (Sergeev, 1990) Daphnia salina Hebert & Finston, 1993 Daphnia semilumaris Flössner, 1987* Daphnia similis Claus, 1876 Daphnia similoides Hudec, 1991 Daphnia spinulata Birabén, 1917 Daphnia studeri (Rühe, 1914) Daphnia thomsoni Sars, 1894* Daphnia tibetana (Sars, 1903) Daphnia triquetra Sars, 1903 Daphnia truncata (Hebert & Wilson, 2000) Daphnia wankeltae Hebert, 1977 Daphnia wardi (Hebert & Wilson, 2000)
Subgenus Daphnia O. F. Müller, 1785
Daphnia ambigua (Scourfield, 1947) Daphnia arcuata (Forbes, 1893)* Daphnia arenaria (Forbes, 1893)* Daphnia arenata (Hebert, 1995) Daphnia bairdii (Forest, 1879)* Daphnia catawba (Coker, 1926) Daphnia caudata (Sars, 1863)* Daphnia cavicervix (Ekman, 1900) Daphnia cheraphila (Hebert & Finston, 1996) Daphnia clathrata (Forbes, 1893)* Daphnia commutata (Ekman, 1900) Daphnia cristata (Sars, 1862) Daphnia cucullata (Sars, 1862) Daphnia curvirostris (Eylmann, 1887) Daphnia denticulata (Birge, 1879)* Daphnia dentifera (Forbes, 1893) Daphnia dubia (Herrick, 1883) Daphnia elongata (Woltereck, 1932)* Daphnia ezoensis (Uéno, 1972)* Daphnia frigidolimnetica (Ekman, 1904)* Daphnia galeata (Sars, 1864) Daphnia gessneri (Herbst, 1967) Daphnia gibbera (Kortchagin, 1887)* Daphnia hyalina (Leydig, 1860) Daphnia intexta (Forbes, 1890)* Daphnia lacustris (Sars, 1862) Daphnia laevis (Birge, 1879) Daphnia latipalpa (Moniez, 1888)* Daphnia latispina (Kořínek & Hebert, 1996) Daphnia litoralis (Sars, 1890)* Daphnia longiremis (Sars, 1862) Daphnia longispina (O. F. Müller, 1776) Daphnia lumholtzi (Sars, 1885) Daphnia macraocula (Kiser, 1950)* Daphnia marcahuasensis (Valdivia Villar & Burger, 1989) Daphnia melanica (Hebert, 1995) Daphnia mendotae (Birge, 1918) Daphnia middendorffiana (Fischer, 1851) Daphnia minnehaha (Herrick, 1884) Daphnia mitsukuri (Ishikawa, 1896)* Daphnia monacha (Brehm, 1912)* Daphnia morsei (Ishikawa, 1895) Daphnia nasuta (Herrick, 1884)* Daphnia neoobtusa (Hebert, 1995) Daphnia obtusa (Kurz, 1874) Daphnia oregonensis (Kořínek & Hebert, 1996) Daphnia parapulex (Woltereck, 1932)* Daphnia parvula (Fordyce, 1901) Daphnia peruviana (Harding, 1955) Daphnia pileata (Hebert & Finston, 1996) Daphnia prolata (Hebert & Finston, 1996) Daphnia propinqua (Sars, 1895)* Daphnia pulex (Leydig, 1860) Daphnia pulicaria (Forbes, 1893) Daphnia pulicarioides (Burckhardt, 1899)* Daphnia pulicoides (Woltereck, 1932)* Daphnia retrocurva (Forbes, 1882) Daphnia rosea (Sars, 1862) Daphnia schmackeri (Poppe, 1890)* Daphnia schoedleri (Sars, 1862)* Daphnia sinevi (Kotov, Ishida & Taylor, 2006) Daphnia sonkulensis (Manujlova, 1964)* Daphnia tanakai (Ishida, Kotov & Taylor, 2006) Daphnia thorata (Forbes, 1893) Daphnia titicacensis (Birge, 1909)* Daphnia turbinata (Sars, 1903) Daphnia typica (Mackin, 1931)* Daphnia umbra (Taylor et al., 1996) Daphnia ventrosa (Kortchagin, 1887)* Daphnia villosa (Kořínek & Hebert, 1996) Daphnia whitmani (Ishikawa, 1896)* Daphnia zschokkei (Stingelin, 1894)*
Incertae sedis
Daphnia abrupta Haldeman, 1842* Daphnia acuminirostris Lucas, 1896* Daphnia affinis Sars, 1863* Daphnia alluaudi Richard, 1896* Daphnia americana Fordyce, 1904* Daphnia angulata Say, 1818* Daphnia angulifera Forbes, 1893* Daphnia balchashensis Manujlova, 1948* Daphnia berolinensis (Schoedler, 1866)* Daphnia biwaensis Uéno, 1934* Daphnia bohemica Burckhardt, 1899* Daphnia brasiliensis Lubbock, 1854* Daphnia brevicauda Chambers, 1877* Daphnia cyclocephala Burckhardt, 1899* Daphnia decipiens Burckhardt, 1899* Daphnia degenerata Schmankewitsch, 1875* Daphnia dolichocantha (Dybowsky & Grochowski, 1895)* Daphnia dorsalis Rafinesque, 1817* Daphnia echinata Schmarda, 1854* Daphnia ephippiata Koch, 1841* Daphnia eurycephala (Daday, 1911)* Daphnia expansa Sars, 1914* Daphnia foreli Burckhardt, 1899* Daphnia friedeli Hartwig, 1897* Daphnia granaria Nicolet, 1849* Daphnia gravis Schödler, 1877* Daphnia hamata Brady, 1898* Daphnia heuscheri Burckhardt, 1899* Daphnia himalaya Manca, Martin, Peñalva-Arana & Benzie, 2006* Daphnia hodgsoni Sars, 1916* Daphnia honorata King, 1853* Daphnia hybus Ross, 1897* Daphnia insulana Moniez, 1889* Daphnia intermedia (Studer, 1878)* Daphnia izpodvala Kotov & Taylor, 2010 Daphnia juvensis Burckhardt, 1899* Daphnia katrajensis Rane, Jafri & Rafiq, 1992* Daphnia kerusses Cox, 1883* Daphnia kingi Schödler, 1877* Daphnia kirimensis Weltner, 1898* Daphnia kisilkumensis Schödler, 1877* Daphnia lamellata Sars, 1914* Daphnia leucocephala Sars, 1903* Daphnia leydigi P. E. Müller, 1867* Daphnia longicornis Sars, 1890* Daphnia macrura Dana, 1852* Daphnia major Brady, 1898* Daphnia melanea Dufresne & Hebert, 1994* Daphnia minnesotensis Herrick, 1895* Daphnia mirabilis Stingelin, 1915* Daphnia neglecta Burckhardt, 1899* Daphnia newporti Baird, 1859* Daphnia notodonvarani Zacharias, 1905* Daphnia pacifica Taylor, Finston & Hebert, 1998* Daphnia palaearctica Behning, 1928* Daphnia procumbens Sars, 1890* Daphnia psittacea Baird, 1850* Daphnia pusilla (Sars, 1890)* Daphnia ramosa Koch, 1841* Daphnia reticulata Haldeman, 1843* Daphnia richardi Burckhardt, 1899* Daphnia rotundata Say, 1818* Daphnia rotundata Burckhardt, 1899* Daphnia rudis Schmankewitsch, 1875* Daphnia sarsi (Langhans, 1911)* Daphnia serrulata Daday, 1884* Daphnia silvestrii Daday, 1902* Daphnia sima Schödler, 1863* Daphnia simulans Sars, 1903* Daphnia spinosa Herrick, 1879* Daphnia stenocephala (Daday, 1911)* Daphnia tarasca Kraus, 1986* Daphnia tenuirostris Sars, 1890* Daphnia tenuispina Sars, 1916* Daphnia textilis Dana, 1852* Daphnia ulomskyi Behning, 1941* Daphnia variabilis Langhans, 1911* Daphnia ventricosa Hellich, 1877* Daphnia vernalis Sars, 1890* Daphnia wierzejskii Richard, 1896* Daphnia wierzejskii Lityński, 1913*
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