FAMILY Sternopygidae Cope, 1871 - glass knifefishes [=Carapini, Sternopygidae, ?Archaeogymnotioidea, Eigenmanninae] GENUS Archolaemus Korringa, 1970 - glass knifefishes Species Archolaemus blax Korringa, 1970 - blax glass knifefish Species Archolaemus ferreirai Vari et al., 2012 - Mucajai glass knifefish Species Archolaemus janeae Vari et al., 2012 - Xingu glass knifefish Species Archolaemus luciae Vari et al., 2012 - Lucia glass knifefish Species Archolaemus orientalis Stewart et al., 2012 - Sao Francisco glass knifefish Species Archolaemus santosi Vari et al., 2012 - Santos' glass knifefish GENUS Distocyclus Mago Leccia, 1978 - glass knifefishes, South American electric glass knifefishes Species Distocyclus conirostris (Eigenmann & Allen, 1942) - Iquitos glass knifefish Species Distocyclus guchereauae Meunier et al., 2014 - Litany glass knifefish GENUS Eigenmannia Jordan & Evermann, 1896 - glass knifefishes [=Cryptops] Species Eigenmannia antonioi Peixoto et al., 2015 - Anapu glass knifefish Species Eigenmannia besouro Peixoto & Wosiacki, 2016 - Desiderio glass knifefish Species Eigenmannia correntes Campos-da Paz & Queiroz, 2017 - Baixo glass knifefish Species Eigenmannia desantanai Peixoto et al., 2015 - Cuiaba glass knifefish Species Eigenmannia goajira Schultz, 1949 - Socuy glass knifefish Species Eigenmannia guairaca Peixoto et al., 2015 - Paranapanema glass knifefish Species Eigenmannia humboldtii (Steindachner, 1878) - Magdalena glass knifefish Species Eigenmannia limbata (Schreiner & Miranda Ribeiro, 1903) - limbata glass knifefish Species Eigenmannia macrops (Boulenger, 1897) - Guyana glass knifefish Species Eigenmannia matintapereira Peixoto et al., 2015 - Uneiuxi glass knifefish Species Eigenmannia meeki Dutra et al., 2017 - Pucura glass knifefish Species Eigenmannia microstoma (Reinhardt, 1852) - Lagoa Santa glass knifefish Species Eigenmannia muirapinima Peixoto et al., 2015 - Santo Antonio glass knifefish Species Eigenmannia nigra Mago-Leccia, 1994 - Cano Urama glass knifefish Species Eigenmannia pavulagem Peixoto et al., 2015 - Capim glass knifefish Species Eigenmannia sayona Peixoto & Waltz, 2017 - Parguaza glass knifefish Species Eigenmannia trilineata López & Castello, 1966 - threelined glass knifefish Species Eigenmannia vicentespelaea Triques, 1996 - Sao Vicente glass knifefish Species Eigenmannia virescens (Valenciennes, 1836) - glass knifefish [=tumifrons, lineatus] Species Eigenmannia waiwai Peixoto et al., 2015 - Mapuera glass knifefish GENUS Japigny Meunier et al., 2011 - glass knifefishes Species Japigny kirschbaum Meunier et al., 2011 - Kirschbaum's glass knifefish GENUS Rhabdolichops Eigenmann & Allen, 1942 - glass knifefishes [=Guichthys] Species Rhabdolichops lundbergi Correa et al., 2006 - Lundberg's glass knifefish Species Rhabdolichops nigrimans Correa et al., 2006 - Tefe glass knifefish Species Rhabdolichops navalha Correa et al., 2006 - navalha glass knifefish Species Rhabdolichops stewarti Lundberg & Mago-Leccia, 1986 - Stewart's glass knifefish Species Rhabdolichops caviceps (Fernández-Yépez, 1968) - Apure glass knifefish Species Rhabdolichops eastwardi Lundberg & Mago-Leccia, 1986 - Eastward's glass knifefish Species Rhabdolichops electrogrammus Lundberg & Mago-Leccia, 1986 - Orinoco glass knifefish Species Rhabdolichops jegui Keith & Meunier, 2000 - Jegu's glass knifefish Species Rhabdolichops troscheli (Kaup, 1856) - Troschel's glass knifefish [=axillaris, longicaudatus] Species Rhabdolichops zareti Lundberg & Mago-Leccia, 1986 - Zaret's glass knifefish GENUS Sternopygus Müller & Troschel, 1849 - glass knifefishes [=Carapus, Gymnotes, Hildatia] Species Sternopygus aequilabiatus (Humboldt, 1805) - Humboldt's glass knifefish [=dariensis] Species Sternopygus arenatus (Eydoux & Souleyet, 1850) - Guayaquil glass knifefish Species Sternopygus astrabes Mago-Leccia, 1994 - Negro glass knifefish [=castroi] Species Sternopygus branco Crampton et al., 2004 - branco glass knifefish Species Sternopygus dariensis Meek & Hildebrand, 1916 - Tuyra glass knifefish Species Sternopygus macrurus (Bloch & Schneider, 1801) - longtail knifefish [=brasiliensis, caerulescens, marcgravii, sanguinolentus] Species Sternopygus obtusirostris Steindachner, 1881 - Alexo glass knifefish Species Sternopygus pejeraton Schultz, 1949 - Apon glass knifefish Species Sternopygus xingu Albert & Fink, 1996 - Batovi glass knifefish.