FAMILY Synaphobranchidae Johnson, 1862 - cutthroat eels SUBFAMILY Ilyophinae Jordan & Davis, 1891 - arrowtooth eels [=Ilyophididae, Dysommidae, Todarus, Nettodaridae, Dysomminidae, Todaridae] GENUS Atractodenchelys Robins & Robins, 1970 - arrowtooth eels Species Atractodenchelys phrix Robbins & Robbins, 1970 - arrowtooth eel Species Atractodenchelys robinsorum Karmovskaya, 2003 - Chesterfield arrowtooth eel GENUS Dysomma Alcock, 1889 - arrowtooth eels [=Dysommopsis, Nettodarus, Sinomyrus, Todarus] Species Dysomma anguillare Barnard, 1923 - shortbelly eel [=angustus, aphododera, japonicus, zanzibarensis] Species Dysomma brevirostre (Facciolà, 1887) - pignosed arrowtooth eel [=telescopicus] Species Dysomma bucephalus Alcock, 1889 - Bengal arrowtooth eel Species Dysomma dolichosomatum Karrer, 1983 - shortbelly eel Species Dysomma fuscoventralis Karrer & Klausewitz, 1982 - Red Sea arrowtooth eel Species Dysomma goslinei Robins & Robins, 1976 - Gosline's arrowtooth eel Species Dysomma longirostrum Chen & Mok, 2001 - Chen's arrowtooth dysomma eel Species Dysomma melanurum Chen & Weng, 1967 - Tungkang arrowtooth eel Species Dysomma muciparus (Alcock, 1891) - Alcock's dysomma arrowtooth eel Species Dysomma opisthoproctus Chen & Mok, 1995 - Nanfangao arrowtooth eel Species Dysomma polycatodon Karrer, 1983 - Malagasy arrowtooth eel Species Dysomma taiwanense Ho et al., 2015 - Taiwanese arrowtooth eel Species Dysomma tridens Robins et al., 1989 - Robins' arrowtooth eel GENUS Dysommina Ginsburg, 1951 - arrowtooth eels Species Dysommina proboscideus (Lea, 1913) - Lea's arrowtooth eel Species Dysommina rugosa Ginsburg, 1951 - Cumberland Island arrowtooth eel GENUS Ilyophis Gilbert, 1891 - arrowtooth eels Species Ilyophis arx Robins, 1976 - arx arrowtooth eel Species Ilyophis blachei Saldanha & Merrett, 1982 - Porcupine arrowtooth eel Species Ilyophis brunneus Gilbert, 1891 - muddy arrowtooth eel Species Ilyophis nigeli Shcherbachev & Sulak, 1997 - Nigel's arrowtooth eel Species Ilyophis robinsae Sulak & Shcherbachev, 1997 - Robins' arrowtooth eel Species Ilyophis saldanhai Karmovskaya & Parin, 1999 - Saldanha's arrowtooth eel GENUS Linkenchelys Smith, 1989 - arrowtooth eels Species Linkenchelys multipora Smith, 1989 - Cockburn arrowtooth eel GENUS Meadia Böhlke 1951 - abyssal cutthroat eels Species Meadia abyssalis (Kamohara, 1938) - abyssal cutthroat eel Species Meadia roseni Mok et al., 1991 - Tongkang abyssal cutthroat eel GENUS Thermobiotes Geistdoerfer, 1991 - arrowtooth eels Species Thermobiotes mytilogeiton Geistdoerfer, 1991 - deepwater chemosynth SUBFAMILY Synaphobranchinae Johnson, 1862 - cutthroat eels [=Synaphobranchidae] GENUS Diastobranchus Barnard, 1923 - cutthroat eels Species Diastobranchus capensis Barnard, 1923 - basketwork eel [=danae] GENUS Haptenchelys Robins & Martin, in Robins & Robins, 1976 - cutthroat eels Species Haptenchelys parviocularis Tashiro & Shinohara, 2014 - smalleyed abyssal eel Species Haptenchelys texis Robins & Martin, in Robins & Robins, 1976 - Texis cutthroat eel GENUS Histiobranchus Gill, 1883 - cutthroat eels Species Histiobranchus australis (Regan, 1913) - Southern cutthroat eel Species Histiobranchus bathybius (Günther, 1877) - deepwater arrowtooth eel [=infernalis] Species Histiobranchus bruuni Castle, 1964 - Bruun's cutthroat eel GENUS Synaphobranchus Johnson, 1862 - cutthroat eels [=Nettophichthys] Species Synaphobranchus affinis Günther, 1877 - grey cutthroat eel [=brachysomus, indicus, occidentalis, taketae] Species Synaphobranchus brevidorsalis Günther, 1887 - shortdorsal cutthroat eel [=brevidorsalis L, jenkinsi] Species Synaphobranchus calvus Melo, 2007 - bald cutthroat eel Species Synaphobranchus dolichorhynchus (Lea, 1913) - Lea's synaphobranchid eel Species Synaphobranchus kaupii Johnson, 1862 - Kaup's arrowtooth eel [=iraconis, parvipinnis, pinnata, retropinnatus] Species Synaphobranchus oregoni Castle, 1960 - Castle's synaphobranchid eel SUBFAMILY Simenchelyinae Gill, in Goode & Bean, 1879 - pugnose eels [=Simenchelyidae] GENUS Simenchelys Gill, 1879 - pugnose eels [=Conchognathus, Gymnosimenchelys] Species Simenchelys parasitica Gill, 1879 - slime eel [=dofleini, grimaldii, leptosomus].