After Froese & Pauly, 2001 [“The FishBase”] and Krabbenhoft & Munroe, 2003

<==o Symphurus [Aphoristia] ()? [N: 57] [FB: 59]
   |-- S. arawak Robins & Randall, 1965 (Caribbean tonguefish)
   |-- S. arabicus Chabanaud, 1954 [Aphoristia woodmasoni Alcock, 1889; Norman, 1939] (Arabian tonguefish)
   |-- S. atramentatus Jordan & Bollman, 1890 (Inkspot tonguefish)
   |-- S. atricaudus (Jordan & Gilbert, 1880) (California tonguefish)
   |-- S. bathyspilus Krabbenhoft & Munroe, 2003 [Aphoristia woodmasoni Alcock, 1889; Chabanaud, 1954] (Philippine tonguefish)
   |-- S. billykrietei Munroe, 1998 (Kriete's tonguefish)
   |-- S. callopterus Munroe & Mahadeva, 1989 (Chocolate tonguefish)
   |-- S. caribbeanus Munroe, 1991
   |-- S. chabanaudi Mahadeva & Munroe, 1990 (Chabanaud's tonguefish)
   |-- S. civitatium Ginsburg, 1951 (Offshore tonguefish)
   |-- S. diabolicus Mahadeva & Munroe, 1990 (Devil's tonguefish)
   |-- S. diomedeanus (Goode & Bean, 1885) (Spottedfin tonguefish)
   |-- S. elongatus (Günther, 1868) (Elongate tonguefish)
   |-- S. fasciolaris Gilbert, 1892 (Banded tongue-fish)
   |-- S. gilesii (Alcock, 1889)
   |-- S. ginsburgi Menezes & Benvegnú, 1976 (Ginsburg's tonguefish)
   |-- S. gorgonae Chabanaud, 1948 (Gorgonian tonguefish)
   |-- S. insularis Munroe, Brito & Hernandez, 2000
   |-- S. jenynsi Evermann & Kendall, 1907 (Jenyn's tonguefish)
   |-- S. kyaropterygium Menezes & Benvegnú, 1976
   |-- S. leei Jordan & Bollman, 1890 (Lee's tonguefish)
   |-- S. ligulatus (Cocco, 1844) (Elongate tonguesole)
   |-- S. lubbocki Munroe, 1990
   |-- S. marginatus (Goode & Bean, 1886) (Margined tonguefish)
   |-- S. marmoratus Fowler, 1934
   |-- S. melanurus Clark, 1936 (Drab tonguefish)
   |-- S. melasmatotheca Munroe & Nizinski, 1990 (Blackstripe tonguefish)
   |-- S. microlepis Garman, 1899 (Smallfin tonguefish)
   |-- S. microrhynchus (Weber, 1913)
   |-- S. minor Ginsburg, 1951 (Largescale tonguefish)
   |-- S. monostigmus Munroe, 2006 (spotbelly tonguefish)
   |-- S. nebulosus (Goode & Bean, 1883) (Freckled tonguefish)
   |-- S. nigrescens Rafinesque, 1810 (Tonguesole)
   |-- S. normani Chabanaud, 1950 (Norman's tonguesole)
   |-- S. novemfasciatus Shen & Lin, 1984
   |-- S. ocellatus von Bonde, 1922 (Double-spot tonguesole)
   |-- S. oculellus Munroe, 1991
   |-- S. oligomerus Mahadeva & Munroe, 1990 (Spotfin tonguefish)
   |-- S. ommaspilus Böhlke, 1961 (Ocellated tonguefish)
   |-- S. orientalis (Bleeker, 1879)
   |-- S. parvus Ginsburg, 1951 (Pygmy tonguefish)
   |-- S. pelicanus Ginsburg, 1951 (Longtail tonguefish)
   |-- S. piger (Goode & Bean, 1886) (Deepwater tonguefish)
   |-- S. plagiusa (Linnaeus, 1766) (Blackcheek tonguefish)
   |-- S. plagusia (Bloch & Schneider, 1801) (Duskycheek tonguefish)
   |-- S. prolatinaris Munroe, Nizinski & Mahadeva, 1991 (Halfstriped tonguefish)
   |-- S. pusillus (Goode & Bean, 1885) (Northern tonguefish)
   |-- S. regani Weber & de Beaufort, 1929
   |-- S. reticulatus Munroe, 1990
   |-- S. rhytisma Böhlke, 1961 (Patchtail tonguefish)
   |-- S. sayademalhensis Chabanaud, 1955a [Aphoristia woodmasoni Alcock, 1889; Norman, 1928]
   |-- S. septemstriatus (Alcock, 1891) (Sevenband tonguesole)
   |-- S. stigmosus Munroe, 1998 (Blotchfin tonguefish)
   |-- S. strictus Gilbert, 1905 (Blackbelly tonguesole)
   |-- S. tessellatus (Quoy & Gaimard, 1824)
   |-- S. trewavasae Chabanaud, 1948 (Trewavas' tonguefish)
   |-- S. trifasciatus (Alcock, 1894) (Threeband tonguesole)
   |-- S. undecimplerus Munroe & Nizinski, 1990 (Dark cheek tongue)
   |-- S. urospilus Ginsburg, 1951 (Spottail tonguefish)
   |-- S. variegatus (Gilchrist, 1903)
   |-- S. varius Garman, 1899 (Mottled tonguefish)
   |-- S. williamsi Jordan & Culver, 1895 (William's tonguefish)
   `-- S. woodmasoni (Alcock, 1889) [Aphoristia woodmasoni Alcock, 1889] (Indian  tonguefish)

Reference(s):