After Nelson, 1994, with species from Froese & Pauly, 2001 [“The Fishbase”]

<==o Fundulidae (topminnows, killifishes) [N: 5/48] [FB: 4/42]
   |-- Adinia xenica (Jordan & Gilbert, 1882) (Diamond killifish)
   |--o Fundulus [Gephyrura, Parafundulus] ?Mioc. Plioc. R. NA. Mioc. R. Eu. ()? [N: 29] [FB: 37]
   |  |-- F. albolineatus Gilbert, 1891 (Whiteline topminnow)
   |  |-- F. auroguttatus (Hay, 1885)
   |  |-- F. bermudae Günther, 1874
   |  |-- F. bifax Cashner & Rogers, 1988 (Stippled studfish)
   |  |-- F. blairae Wiley & Hall, 1975
   |  |-- F. catenatus (Storer, 1846) (Northern studfish)
   |  |-- F. chrysotus (Günther, 1866) (kultakorva; Golden topminnow)
   |  |-- F. cingulatus Valenciennes, 1846 (Banded topminnow)
   |  |-- F. confluentus Goode & Bean, 1879 (Marsh killifish)
   |  |--o F. diaphanus (Lesueur, 1817) (Banded killifish)
   |  |  |-- F. d. diaphanus (Lesueur, 1817) (Banded killifish)
   |  |  `-- F. d. menona Jordan & Copeland, 1877
   |  |-- F. dispar (Agassiz, 1854) (Starhead topminnow)
   |  |-- F. escambiae (Bollman, 1887) (Russetfin topminnow)
   |  |-- F. euryzonus Suttkus & Cashner, 1981 (Broadstripe topminnow)
   |  |-- F. grandis grandis Baird & Girard, 1853 (Gulf killifish)
   |  |-- F. grandis saguanus Rivas, 1948
   |  |-- F. grandissimus Hubbs, 1936
   |  |--o F. heteroclitus (Linnaeus, 1766) (mummichog; Mummichog)
   |  |  |-- F. h. heteroclitus (Linnaeus, 1766) (mummichog; Mummichog)
   |  |  `-- F. h. macrolepidotus (Walbaum, 1792)
   |  |-- F. jenkinsi (Evermann, 1892) (Saltmarsh topminnow)
   |  |-- F. julisia Williams & Etnier, 1982 (Barrens topminnow)
   |  |-- F. lima Vaillant, 1894 (Killifish)
   |  |-- F. lineolatus (Agassiz, 1854) (Lined topminnow)
   |  |-- F. luciae (Baird, 1855) (Spotfin killifish)
   |  |-- F. majalis (Walbaum, 1792) (Striped killifish)
   |  |-- F. notatus (Rafinesque, 1820) (Blackstripe topminnow)
   |  |-- F. nottii (Agassiz, 1854) (Bayou topminnow)
   |  |-- F. olivaceus (Storer, 1845) (Blackspotted topminnow)
   |  |-- F. parvipinnis Girard, 1854 (California killifish)
   |  |-- F. persimilis Miller, 1955
   |  |-- F. pulvereus (Evermann, 1892) (Bayou killifish)
   |  |-- F. rathbuni Jordan & Meek, 1889 (Speckled killifish)
   |  |-- F. relictus Able & Felley, 1988
   |  |-- F. rubrifrons (Jordan, 1880)
   |  |-- F. sciadicus Cope, 1865 (Plains topminnow)
   |  |-- F. seminolis Girard, 1859 (Seminole killifish)
   |  |-- F. similis (Baird & Girard, 1853) (Longnose killifish)
   |  |-- F. stellifer (Jordan, 1877) (Southern studfish)
   |  |-- F. waccamensis Hubbs & Raney, 1946 (Waccamaw killifish)
   |  `-- F. zebrinus Jordan & Gilbert, 1883 (Plains killifish)
   |-- Leptolucania ommata (Jordan, 1884) (Pygmy killifish)
   |--o Lucania ()? [3]
   |  |-- L. goodei Jordan, 1880 (Bluefin killifish)
   |  |-- L. interioris Hubbs & Miller, 1965 (Cuatrocienegas killifish)
   |  `-- L. parva (Baird & Girard, 1855) (Rainwater killifish)
   `-- Plancterus

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