After Kottelat, 2012

<==o Oxynoemacheilus Banarescu & Nalbant, 1966 [Nemacheilus (Oxynoemacheilus) Banarescu & Nalbant, 1966; Nun Banarescu & Nalbant in  Banarescu, Nalbant & Goren, 1982; Nanoschistura Erk'akan, Özeren & Nalbant, 2007]
   |-- O. anatolicus Erk'akan, Özeren & Nalbant, 2008
   |-- O. angorae (Steindachner, 1897) [Nemacheilus Angorae Steindachner, 1897] (Angora loach)
   |-- O. araxensis (Banarescu & Nalbant in Banarescu, Nalbant & Balik, 1978) [Orthrias angorae araxensis Banarescu & Nalbant in Banarescu, Nalbant & Balik, 1978]
   |-- O. argyrogramma (Heckel, 1848) [Cobitis argyrogramma Heckel, 1848; Noemacheilus insignis euphraticus Banarescu & Nalbant, 1964; Noemacheilus tschaiyssuensis Banarescu & Nalbant, 1964; Orthias euphraticus (Banarescu & Nalbant, 1964)]
   |-- O. atili Erk'akan, 2012
   |-- O. banarescui (Delmastro, 1982) [Orthrias brandti banarescui Delmastro, 1982]
   |-- O. bergianus (Derjavin, 1934) [Nemachilus bergianus Derjavin, 1934]
   |-- O. brandtii (Kessler, 1877) [Nemachilus brandtii Kessler, 1877; ?Nemachilus brandti gibbusnazus Elanidze, 1983; Orthrias brandti (Kessler, 1877)] (Kura Loach)
   |-- O. bureschi (Drensky, 1928) [Nemachilus Bureschi Drensky, 1928; Orthrias brandti macedonicus Šoric, 2000]
   |-- O. ceyhanensis (Erk’akan, Nalbant & Özeren, 2007) [Schistura ceyhanensis Erk’akan, Nalbant & Özeren, 2007]
   |-- O. cinicus (Erk'akan, Nalbant & Özeren, 2007) [Barbatula cinicus Erk'akan, Nalbant & Özeren, 2007]
   |-- O. cyri (Berg, 1910) [Nemachilus tigris cyri Berg, 1910]
   |-- O. ercisianus (Erk'akan & Kuru, 1986) [Orthias angorae ercisianus Erk'akan & Kuru, 1986; Nemacheilus pulsiz Krupp, 1992; Barbatula pulsiz (Krupp, 1992)]
   |-- O. erdali (Erk'akan, Nalbant & Özeren, 2007) [Barbatula erdali Erk'akan, Nalbant & Özeren, 2007]
   |-- O. eregliensis (Banarescu & Nalbant, 1978) [Orthias angorae eregliensis Banarescu & Nalbant, 1978]
   |-- O. evreni (Erk’akan, Nalbant & Özeren, 2007) [Schistura evreni Erk’akan, Nalbant & Özeren, 2007]
   |-- O. frenatus (Heckel, 1843) [Cobitis frenata Heckel, 1843; Nemacheilus frenatus afrenatus Battalgil, 1941]
   |-- O. galilaeus (Günther, 1864) [Cobitis galilaea Günther, 1864; Nemacheilus galilaeus (Günther, 1864)]
   |-- O. germencicus (Erk'akan, Nalbant & Özeren, 2007) [Barbatula germencicus Erk'akan, Nalbant & Özeren, 2007]
   |-- O. hamwii (Krupp & W. Schneider, 1991) [Nemacheilus hamwii (Krupp & W. Schneider, 1991)]
   |-- O. insignis (Heckel, 1843) [Cobitis insignis Heckel, 1843; Noemacheilus angorae jordanicus Banarescu & Nalbant, 1966; ?Nemacheilus insignis tortonesei Banarescu & Nalbant, 1966; Orthias dori Goren & Banarescu in Banarescu, Nalbant & Goren, 1982; Orthrias pantheroides Goren & Banarescu in Banarescu, Nalbant & Goren, 1982; Orthrias israeliticus Goren & Banarescu in Banarescu, Nalbant & Goren, 1982]
   |-- O. kaynaki Erk'akan, Özeren & Nalbant, 2008
   |-- O. kermanshahensis (Banarescu & Nalbant, 1966) [Noemacheilus kermanshahensis Banarescu & Nalbant, 1966]
   |-- O. kiabii Golzarianpour, Abdoli & Freyhof, 2011[3]
   |-- O. kosswigi (Erk'akan & Kuru, 1986) [Orthrias angorae kosswigi Erk'akan & Kuru, 1986]
   |-- O. lenkoranensis (Abdurakhmanov, 1962) [?Nemacheilus bergi Gratsianov, 1907; Nemacheilus angorae lenkoranensis Abdurakhmanov, 1962; ?Nemacheilus angorae alasanicus Elanidze, 1983]
   |-- O. leontinae (Lortet, 1883) [Nemacheilus leontinae Lortet, 1883]
   |-- O. mediterraneus (Erk'akan, Nalbant & Özeren, 2007) [Barbatula mediterraneus Erk'akan, Nalbant & Özeren, 2007]
   |-- O. merga (Krynicki in Nordmann, 1840) [Cobitis merga Krynicki in Nordmann, 1840; Cobitis nurga Valenciennes in Cuvier & Valenciennes, 1846 (unjust. emend.); Nemacheilus terekensis Gratzianow, 1907] (Krynicki's loach)
   |-- O. mesudae Erk'akan, 2012
   |-- O. namiri (Krupp & W. Schneider, 1991) [Nemacheilus namiri Krupp & W. Schneider, 1991]
   |?- ?“O.” oxianus (Kessler, 1877) [Nemacheilus Brandtii var. oxiana Kessler, 1877; Nemacheilus flavus Berg, 1905; Nemacheilus oxianus natio zeravschani Turdakov, 1936] (Amu-Darya stone loach)
   |-- O. panthera (Heckel, 1843) [Cobitis panthera Heckel, 1843; Cobitis leopardus Heckel, 1843]
   |-- O. paucilepis (Erk'akan, Nalbant & Özeren, 2007) [Barbatula paucilepis Erk'akan, Nalbant & Özeren, 2007]
   |-- O. persa (Heckel, 1848) [Cobitis persa Heckel, 1848; Orthrias farsicus Nalbant & Bianco, 1998]
   |-- O. phoxinoides (Erk'akan, Nalbant & Özeren, 2007) [Barbatula phoxinoides Erk'akan, Nalbant & Özeren, 2007]
   |-- O. pindus (Economidis, 2005) [Orthrias pindus Economidis, 1991 (nomen nudum); Barbatula pindus Economidis, 2005]
   |-- O. samanticus (Banarescu & Nalbant in Banarescu, Nalbant & Balik, 1978) [Orthrias brandti samanticus Banarescu & Nalbant in Banarescu, Nalbant & Balik, 1978]
   |-- O. seyhanensis (Banarescu, 1968) [Noemacheilus tigris seyhanensis Banarescu, 1968]
   |-- O. seyhanicola (Erk’akan, Nalbant & Özeren, 2007) [Schistura seyhanicola Erk’akan, Nalbant & Özeren, 2007]
   |-- O. simavicus (Balik & Banarescu in Banarescu, Nalbant & Balik, 1978) [Orthrias brandti simavicus (Balik & Banarescu, 1978)]
   |-- O. theophilii Stoumboudi, Kottelat & Barbieri, 2006
   |-- O. tigris (Heckel, 1843) [Cobitis tigris Heckel, 1843]
   `-- O. tongiorgii (Nalbant & Bianco, 1998) [Seminemacheilus tongiorgii Nalbant & Bianco, 1998]

Reference(s):