Bathypterois dubius Vaillant, 1888: 124 Bathypterois dubius , Quéro & Ribes, 1999 : 200 B. mediterraneus B. dubius Bathypterois mediterraneus Bauchot, 1962: 639 Bathypterois mediterraneus, Klausewitz, 1989 : 255 A checklist of the deep sea fishes of the Levant Sea, Mediterranean Sea Goren, Menachem Galil, Bella S. Zootaxa 2015 3994 4 507 530 KXSY Vaillant, 1888 Vaillant 1888 [151,572,1715,1741] Actinopterygii Ipnopidae Bathypterois Animalia Aulopiformes 5 512 Chordata species dubius    Bathypterois dubiusVaillant, 1888: 124, Pls. 9, 12, 14, 15. Typelocality: Azores, Atlantic Ocean.  Bathypterois dubius, Quéro & Ribes, 1999: 200–204 (synonymized  B. mediterraneuswith  B. dubius);  Bathypterois mediterraneusBauchot, 1962: 639, Figs. 4b, 6. Typelocality: Rosas, Costa Brava, Spain.  Bathypterois mediterraneus, Klausewitz, 1989: 255; Galil & Goren, 1994: 48; Goren & Galil, 1997: 201; 2002: 151; Gates et    al., 2012: 217–219.   Distribution.Northeastern Atlantic, Mediterranean; depth range 260–2800 m.   Comment. Quero & Ribes (1999), who compared the populations of  B. mediterraneusand  B. dubiusfrom the northeast Atlantic and Mediterranean, concluded that they are identical and  B. mediterraneusis a junior synonym of  B. dubius. Froese & Pauly (2014)stated that  B. mediterraneus"may be valid". Further taxonomic study using molecular tools may resolve the issue.