◆ Akawaio penak Maldonado-Ocampo, López-Fernández, Taphorn, Bernard, Crampton & Lovejoy 2013 *2013『Akawaio penak, a New Genus and Species of Neotropical Electric Fish [Gymnotiformes, Hypopomidae] Endemic to the upper Mazaruni River in the Guiana Shield:Javier Alejandro Maldonado-Ocampo, Hernan López-Fernández, Donald Charles Taphorn, Calvin Rodrick Bernard, William Gareth Richard Crampton & Nathan R.Lovejoy』。
◆ Brachyhypopomus brevirostris (Steindachner 1868)
syn.Hypopomus brevirostris (Steindachner 1868) Ellis 1912 Rhamphichthys brevirostris Steindachner 1868 *1870『Catalogue of the Physostomi, Containing the Families Gymnotidae, Symbranchidae, Muraenidae, Pegasidae and of the Lophobranchii, Plectognathi, Dipnoi, Ganoidei, Chondropterygii, Cyclostomata, and Leptocardii in the British Museum:Albert Karl Ludwig Gotthilf Günter』。 *1905『The Gymnotidæ:Carl Henry Eigenmann & David Perkins Ward』。 *1912『The Fresh-Water Fishes of British Guiana, Including a Study of the Ecological Grouping of Species, and the Relation of the Fauna of the Plateau to That of of the Low-Land 8, Systematic Account of the Fresh-Water Fishes of British Guiana:Carl Henry Eigenmann』。 *1913-1914『The Gymnotid Eels of Tropical America 1913:Max Mapes Ellis』。
"ブルントノーズナイフ"。
◆ Brachyhypopomus bullocki
◆ Brachyhypopomus cunius Crampton, de Santana, Waddell & Lovejoy 2017
syn.Brachyhypopomus sp.'cunia' Crampton, de Santana, Waddell & Lovejoy 2016
◆ Brachyhypopomus degy Dutra, Peixoto, Ochoa, Ohara, de Santana, Menezes & Datovo 2021 *2021『A New Species of Amazonian Bluntnose Knife-Fish Brachyhypopomus [Gymnotiformes, Hypopomidae], with Comments on Its Phylogenetic Position:Guilherme Moreira Dutra, Luiz Antonio Wanderley Peixoto, Luz Eneida Ochoa, Willian Massaharu Ohara, Carlos David de Santana, Naércio Aquino Menezes & Aléssio Datovo』。
◆ Brachyhypopomus diazi
syn.Hypopomus diazi
◆ Brachyhypopomus draco
◆ Brachyhypopomus flavipomus Crampton, de Santana, Waddell & Lovejoy 2017
syn.Brachyhypopomus sp.'flavipomus' Crampton, de Santana, Waddell & Lovejoy 2016
◆ Brachyhypopomus gauderio
◆ Brachyhypopomus hamiltoni Crampton, de Santana, Waddell & Lovejoy 2017
syn.Brachyhypopomus sp.'hamiltoni' Crampton, de Santana, Waddell & Lovejoy 2016
◆ Brachyhypopomus hendersoni Crampton, de Santana, Waddell & Lovejoy 2017
syn.Brachyhypopomus sp.'hendersoni' Crampton, de Santana, Waddell & Lovejoy 2016
◆ Brachyhypopomus menezesi Crampton, de Santana, Waddell & Lovejoy 2017
syn.Brachyhypopomus sp.'menezesi' Crampton, de Santana, Waddell & Lovejoy 2016
◆ Brachyhypopomus occidentalis (Regan 1914)
syn.Hypopomus occidentalis Regan 1914 *2021『New Records and Range Extensions to the Costa Rican Fresh-Water Fish Fauna, with an Updated Check-List:Arturo Angulo』。
"Occidental Bluntnose Knife-Fish"。24〜28℃。
◆ Brachyhypopomus palenque Crampton, de Santana, Waddell & Lovejoy 2017
syn.Brachyhypopomus sp.'palenque' Crampton, de Santana, Waddell & Lovejoy 2016
◆ Hypopomus artedi (Kaup 1856)
syn.Brachyrhamphichthys artedi (Kaup 1856) Hypopomus mulleri (Kaup 1856) Parupygus litaniensis Hoedeman 1962 Parupygus savannensis Hoedeman 1962 Rhamphichthys artedi Kaup 1856 ※=artedii。 Rhamphichthys mulleri Kaup 1856
※模式種、但し先に記載された Rhamphichthys artedi Kaup 1856 に統合。 *1870『Catalogue of the Physostomi, Containing the Families Gymnotidae, Symbranchidae, Muraenidae, Pegasidae and of the Lophobranchii, Plectognathi, Dipnoi, Ganoidei, Chondropterygii, Cyclostomata, and Leptocardii in the British Museum:Albert Karl Ludwig Gotthilf Günter』。 *1905『The Gymnotidæ:Carl Henry Eigenmann & David Perkins Ward』。 *1912『The Fresh-Water Fishes of British Guiana, Including a Study of the Ecological Grouping of Species, and the Relation of the Fauna of the Plateau to That of of the Low-Land 8, Systematic Account of the Fresh-Water Fishes of British Guiana:Carl Henry Eigenmann』。 *1913-1914『The Gymnotid Eels of Tropical America 1913:Max Mapes Ellis』。
"アーティディナイフ"。吻端が尖る。
Genus Hypopygus♂ HOEDEMAN 1962 ヒポピグス属
◆ Hypopygus benoneae Peixoto, Dutra, de Santana & Wosicki 2013
◆ Hypopygus hoedemani
◆ Hypopygus isbruckeri
◆ Hypopygus lepturus Hoedeman 1962
"スレンダーテールナイフ"。
◆ Hypopygus minissimus
◆ Hypopygus neblinae
◆ Hypopygus nijsseni
◆ Hypopygus ortegai
◆ Hypopygus varii da Paz 2018 *2018『A New Species of Hypopygus Hoedeman [Gymnotiformes, Rhamphichthyidae] from the Rio Trombetas System, Amazon Basin, Brazil:Ricardo Campos da Paz』。
Genus Microsternarchus♂ FERNÁNDEZ-YÉPEZ 1968 ミクロステルナルクス属
※← [Microsternarchini ALBERT 2001]。
Genus Steatogenys♀ BOULENGER 1898 ステアトゲニス属 "リーフナイフ"・"モトルドナイフ"。
※+Genus Tateichthys♂LA MONTE 1929 (Type species : Tateichthys duidae la Monte 1929)。 ※← [Steatogenini MALDONADO-OCAMPO, LÓPEZ-FERNÁNDEZ, TAPHORN, BERNARD, CRAMPTON & LOVEJOY 2013]。
※← [Steatogini ALBERT 2001]。=Steatogenini、Steatogenyini。
◆ Steatogenys duidae (la Monte 1929)
syn.Tateichthys duidae la Monte 1929
◆ Steatogenys elegans (Steindachner 1880)
syn.Brachyhypopomus elegans (Steindachner 1880) Rhamphichthys elegans Steindachner 1880 ※=Rhamphichthys (Brachyrhamphichthys) elegans Steindachner 1880 Rhamphichthys mirabilis Steindachner 1880 Steatogenes elegans (Steindachner 1880) Eigenmann & Ward 1905 *1905『The Gymnotidæ:Carl Henry Eigenmann & David Perkins Ward』。 *1912『The Fresh-Water Fishes of British Guiana, Including a Study of the Ecological Grouping of Species, and the Relation of the Fauna of the Plateau to That of of the Low-Land 8, Systematic Account of the Fresh-Water Fishes of British Guiana:Carl Henry Eigenmann』。 *1913-1914『The Gymnotid Eels of Tropical America 1913:Max Mapes Ellis』。
pH6.0〜6.5・22〜26℃。IUCN Least Concern ver.3.1。