Please look in Eschmeyer's Catalog of Fishes for authorships of sections, Families of Fishes (all), and related information.

Species in the genus Sternarchorhynchus: [ 34 ] records

axelrodi, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:275, Figs. 26-27 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Rio Tocantins, at future site of Usina Hidroeléctrica Serra da Mesa (ca, 13°44'S, 48°08'W), Município de Minaçu/Cavalcante, Goiás, Brazil. Holotype: MNRJ 31279. Paratypes: MNRJ 12168 (8), USNM 391570 (1). Plus non-type specimens. Type catalog: Ferraris et al. 2017:[12] [ref. 35236]. •Valid as Sternarchorhynchus axelrodi de Santana & Vari 2010 -- (Ferraris et al. 2017:[12] [ref. 35236]). Current status: Valid as Sternarchorhynchus axelrodi de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: Tocantins River, Brazil. Habitat: freshwater.

britskii, Sternarchorhynchus Campos-da-Paz [R.] 2000:528, Fig. 9 [Copeia 2000 (no. 2); ref. 24452] Rio Paramá at Ilha Solteira dam (right margin), about 20°30'S, 51°00'W, Mato Grosso do Sul, Brazil. Holotype: MZUSP 52923. Paratypes: MCP 12123 (1); MNRJ 17590 (1); MZUSP 24464 (6), 43277 (3, c&s). Plus non-type material. Type catalog: Ferraris et al. 2017:[12] [ref. 35236]. •Valid as Sternarchorhynchus britskii Campos-da-Paz 2000 -- (Albert 2001:112 [ref. 25614], Albert in Reis et al. 2003:500 [ref. 27061], de Santana & Crampton 2006:58 [ref. 28619], de Santana & Nogueira 2006:85 [ref. 28638], de Santana & Vari 2010:281 [ref. 30785], Triques 2011:304 [ref. 31671], Ferraris et al. 2017:[12] [ref. 35236], dos Reis et al. 2020:463 [ref. 38364]). Current status: Valid as Sternarchorhynchus britskii Campos-da-Paz 2000. Apteronotidae: Apteronotinae. Distribution: South America: upper Paraná River basin (Brazil). Habitat: freshwater.

caboclo, Sternarchorhynchus de Santana [C. D.] & Nogueira [A.] 2006:89, Figs. 1b, 2b-c [Ichthyological Exploration of Freshwaters v. 17 (no. 1); ref. 28638] Rio Mucajaí, below Cachoeira Paredão 2, Roraima, Brazil. Holotype: INPA 22894. Paratypes: INPA 10578 (1), 10592 (2), 10594 (60, 2 c&s). Type catalog: Ferraris et al. 2017:[12] [ref. 35236]. Name appeared first in an earlier paper in the same journal issue: de Santana & Taphorn 2006:3 [ref. 28632]. •Valid as Sternarchorhynchus caboclo de Santana & Nogueira 2006 -- (de Santana & Vari 2010:284 [ref. 30785], Ferraris et al. 2017:[12] [ref. 35236]). Current status: Valid as Sternarchorhynchus caboclo de Santana & Nogueira 2006. Apteronotidae: Apteronotinae. Distribution: Mucajaí River basin, Brazil. Habitat: freshwater.

chaoi, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:286, Fig. 31 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Rio Jamari, Porto Velho, diversion canal of Usina Hidroeléctica, Samuel (ca. 8°27'S, 63°30'W), Rondônia, Brazil. Holotype: INPA 28357. Paratypes: INPA 20851 (11), USNM 391713 (1). Plus non-type material. Type catalog: Ferraris et al. 2017:[12] [ref. 35236]. •Valid as Sternarchorhynchus chaoi de Santana & Vari 2010 -- (Ferraris et al. 2017:[12] [ref. 35236]). Current status: Valid as Sternarchorhynchus chaoi de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: South America: Jamari River drainage, Rondônia, Brazil. Habitat: freshwater.

cramptoni, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:288, Figs. 32-33 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Rio Solimões, downstream from mouth of Río Purus, 3°27'27"S, 60°45'26"W, Amazonas, Brazil. Holotype: FMNH 115489. Paratypes: many at FMNH, INPA, MCP. Plus many non-type specimens. Type catalog: Ferraris et al. 2017:[13] [ref. 35236]. •Valid as Sternarchorhynchus cramptoni de Santana & Vari 2010 -- (Ferraris et al. 2017:[13] [ref. 35236], Meza-Vargas et al. 2021:21 [ref. 39298], Torgersen et al. 2023:777 [ref. 40692]). Current status: Valid as Sternarchorhynchus cramptoni de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: South America: Amazon River (Brazil, Colombia and Peru). Habitat: freshwater.

curumim, Sternarchorhynchus de Santana [C. D.] & Crampton [W. G. R.] 2006:59, Fig. 1 [Zootaxa No. 1166; ref. 28619] Rio Tefé, Toco Preto, Municipality of Tefé, 3°47.31'S, 64°59.91'W, Amazonas, Brazil. Holotype: MCP 38304. Paratypes: INPA 25256 (1, c&s), MCP 38305 (2). •Valid as Sternarchorhynchus curumim de Santana & Crampton 2006 -- (de Santana & Vari 2010:291 [ref. 30785]). Current status: Valid as Sternarchorhynchus curumim de Santana & Crampton 2006. Apteronotidae: Apteronotinae. Distribution: Rio Tefé, Amazon River basin, Brazil. Habitat: freshwater.

curvirostris, Sternarchus (Rhamphosternarchus) Boulenger [G. A.] 1887:282, Pl. 24 [Proceedings of the Zoological Society of London 1887 (pt 2) (art. 2) (for 1 Mar. 1887); ref. 532] Río Bobanaza basin, eastern Ecuador. Syntypes: ? BMNH 1880.12.8.90-91 (2). Type catalog: Ferraris et al. 2017:[13] [ref. 35236]. •Valid as Sternarchorhynchus curvirostris (Boulenger 1887) -- (Mago-Leccia 1994:37 [ref. 21320], Campos-da-Paz 1995:34 [ref. 22512], Britski et al. 1999:90 [ref. 24147], Campos-da-Paz 2000:528 [ref. 24452], Albert 2001:112 [ref. 25614], Albert in Reis et al. 2003:500 [ref. 27061], de Santana & Crampton 2006:58 [ref. 28619] as cf. curvirostris, de Santana & Nogueira 2006:85 [ref. 28638], de Santana & Vari 2010:000 [ref. 30785], Barriga Salazar 2014:116 [ref. 35745], Sarmiento et al. 2014:188 [ref. 35004], Ferraris et al. 2017:[13] [ref. 35236], see DoNascimiento et al. 2017:[15] [ref. 35679], Ochoa et al. 2020:63 [ref. 37781], Chuctaya et al. 2022:33 [ref. 42137]). Current status: Valid as Sternarchorhynchus curvirostris (Boulenger 1887). Apteronotidae: Apteronotinae. Distribution: South America: Bobanaza River, upper Amazon River basin (Bolivia and Ecuador; northeastern Peru). IUCN (2016): Data Deficient. Habitat: freshwater.

freemani, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:296, Fig. 38 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Essequibo River basin, Lower Potaro River at Amatuk (ca. 5°18'N, 59°18'W), Guyana. Holotype: CAS 72246. Paratypes: CAS 72248 (1), 227622 [ex CAS 72246] (1, plus one lost). Type catalog: Ferraris et al. 2017:[13] [ref. 35236]. •Valid as Sternarchorhynchus freemani de Santana & Vari 2010 -- (Ferraris et al. 2017:[13] [ref. 35236], Taphorn et al. 2022:38 [ref. 41297]). Current status: Valid as Sternarchorhynchus freemani de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: South America: lower portions of Essequibo River basin (Guyana) endemic. Habitat: freshwater.

galibi, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:298, Fig. 39 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Lawa River at Stroomafwaarts Rapids near Anapaikekondre (= Anapaike country, Anapaika at 3°34'N, 109°39'W), Marowijne District, Suriname. Holotype: ZMA 109366. Paratypes: ANSP 187155 (1), IRSCNB 16793 (7), ZMA 124524 (1). Plus one non-type specimen. Type catalog: Ferraris et al. 2017:[13] [ref. 35236]. •Valid as Sternarchorhynchus galibi de Santana & Vari 2010 -- (Ferraris et al. 2017:[13] [ref. 35236]). Current status: Valid as Sternarchorhynchus galibi de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: Lawa River, Marowijne River basin, along border of Suriname and French Guiana. Habitat: freshwater.

gnomus, Sternarchorhynchus de Santana [C. D.] & Taphorn [D. C.] 2006:2, Figs. 1-2 [Ichthyological Exploration of Freshwaters v. 17 (no. 1); ref. 28632] Río Caroní, at the confluence with the Río Claro, 7°54'30"N, 63°02'50"W, Bolivar, Venezuela. Holotype: MCNG 53963. Paratypes: ANSP 182798 (1), INPA 25636 (3, 1 c&s), MCNG 18435 (5). Type catalog: Ferraris et al. 2017:[13] [ref. 35236]. •Valid as Sternarchorhynchus gnomus de Santana & Taphorn 2006 -- (de Santana & Vari 2010:299 [ref. 30785], Ferraris et al. 2017:[13] [ref. 35236]). Current status: Valid as Sternarchorhynchus gnomus de Santana & Taphorn 2006. Apteronotidae: Apteronotinae. Distribution: Caroní River basin, Venezuela. Habitat: freshwater.

goeldii, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:301, Fig. 41 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Rio Purus, 3°50'06"S, 61°23'59"W, Amazonas, Brazil. Holotype: FMNH 115520. Paratypes: FMNH 115520 (1); INPA 17633 (4), 24109 (5); USNM 373081 (1). Plus many non-type specimens. Type catalog: Ferraris et al. 2017:[13] [ref. 35236]. •Valid as Sternarchorhynchus goeldii de Santana & Vari 2010 -- (Ferraris et al. 2017:[13] [ref. 35236], Meza-Vargas et al. 2021:21 [ref. 39298]). Current status: Valid as Sternarchorhynchus goeldii de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: South America: Amazon River basin (Brazil and Peru). Habitat: freshwater.

guayaberensis, Sternarchorhynchus Ochoa [L. E.], Albornoz-Garzón [J. G.] & DoNascimiento [C.] 2025:542, Figs. 1-2 [Ichthyology & Herpetology v. 113 (no. 3); ref. 42411] Duda River, Guaviare River drainage, Orinoco River basin, La Macarena, Meta, Colombia, 02°32'56.5"N, 73°57' 12.9"W. Holotype: IAVHP 19765. Paratypes: ANSP 207374 (1), IAVHP 19594 (1), IAVHP 30828 (1). •Valid as Sternarchorhynchus guayaberensis Ochoa, Albornoz-Garzón & DoNascimiento 2025. Current status: Valid as Sternarchorhynchus guayaberensis Ochoa, Albornoz-Garzón & DoNascimiento 2025. Apteronotidae: Apteronotinae. Distribution: South America: Guayabero River drainage, upper basin of the Guaviare River, Orinoco River basin, Meta, Colombia. Habitat: freshwater.

hagedornae, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:305, Figs. 43-44 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Manu Marine Biosphere Reserve, Quebrada Pachija, tributary emptying into Río Manu, 3 kilometers upstream of Pakitza (= 11°55'48"S,71°15'18"W), Madre de Dios, Peru. Holotype: MUSM 30534. Paratypes: MBUCV 33742 (2); MUSM 30534 (1), 30535 (1); USNM 391574 (2). Type catalog: Ferraris et al. 2017:[13] [ref. 35236]. •Valid as Sternarchorhynchus hagedornae de Santana & Vari 2010 -- (Ferraris et al. 2017:[13] [ref. 35236], Ochoa et al. 2020:63 [ref. 37781]). Current status: Valid as Sternarchorhynchus hagedornae de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: South America: Upper Madeira River basin (Bolivia and southeastern Peru). Habitat: freshwater.

higuchii, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:307, Figs. 45-46 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Rio Uatumã, Cachoeira do Miriti, Presidente Figueredo, ca. 2°01'S, 59°28W, Amazonas, Brazil. Holotype: INPA 28358. Paratypes: INPA 20855 (1), USNM 391724 (1). Plus non-type specimens. Type catalog: Ferraris et al. 2017:[13] [ref. 35236]. •Valid as Sternarchorhynchus higuchii de Santana & Vari 2010 -- (Ferraris et al. 2017:[13] [ref. 35236], Ochoa et al. 2025:549 [ref. 42411]). Current status: Valid as Sternarchorhynchus higuchii de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: South America: Uatumã River drainage, Amazonas, Brazil. Habitat: freshwater.

inpai, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:310, Figs. 47-48 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Rio Mapuera, Cachoeira Porteira, last fall before Rio Trombetas, ca. 1°05'S, 57°02'W, Pará, Brazil. Holotype: INPA 22895. Paratypes: INPA 22899 (10, 1 c&s), USNM 391715 (1). Type catalog: Ferraris et al. 2017:[13] [ref. 35236]. •Valid as Sternarchorhynchus inpai de Santana & Vari 2010 -- (Ferraris et al. 2017:[13] [ref. 35236]). Current status: Valid as Sternarchorhynchus inpai de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: Mapuera River, Trombetas River basin, Brazil. Habitat: freshwater.

jaimei, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:312, Fig. 49 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Rio Uatumã, Cachoeira do Miriti, Presidente Figueredo, ca. 2°01'S, 59°28'W, Amazonas, Brazil. Holotype: INPA 28359. Paratypes: INPA 22122 (10, 1 c&s), 22902 (2); USNM 391716 (1). Type catalog: Ferraris et al. 2017:[14] [ref. 35236]. •Valid as Sternarchorhynchus jaimei de Santana & Vari 2010 -- (Ferraris et al. 2017:[14] [ref. 35236]). Current status: Valid as Sternarchorhynchus jaimei de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: Uatumã River, Amazonas, Brazil. Habitat: freshwater.

kokraimoro, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:314, Figs. 51-52 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Cachoeira de Kaituká, at Altamira, 3°12'S, 52°12'W, Rio Xingu, Pará, Brazil. Holotype: INPA 28360. Paratypes: INPA 3932 (1). Type catalog: Ferraris et al. 2017:[14] [ref. 35236]. •Valid as Sternarchorhynchus kokraimoro de Santana & Vari 2010 -- (Ferraris et al. 2017:[14] [ref. 35236]). Current status: Valid as Sternarchorhynchus kokraimoro de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: Xingu River, Brazil. Habitat: freshwater.

mareikeae, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:317, Figs. 53-54 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Rio Trombetas, Cachoeira Porteira, last fall before Rio Trombetas, ca. 1°05'S, 57°02'W, Pará, Brazil. Holotype: INPA 22896. Paratypes: INPA 22900 (9, 1 c&s), USNM 391717 (1). Type catalog: Ferraris et al. 2017:[14] [ref. 35236]. •Valid as Sternarchorhynchus mareikeae de Santana & Vari 2010 -- (Ferraris et al. 2017:[14] [ref. 35236]). Current status: Valid as Sternarchorhynchus mareikeae de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: Trombetas River, Brazil. Habitat: freshwater.

marreroi, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:318, Fig. 55 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Río Apure, in front of Isla Apurito, left bank (8°00'N, 67°31'W), Apure, Venezuela. Holotype: MBUCV 15806. Paratypes: MBUCV 33750 [ex. MBUCV 15806] (1), 10637 (1). Type catalog: Ferraris et al. 2017:[14] [ref. 35236]. •Valid as Sternarchorhynchus marreroi de Santana & Vari 2010 -- (Ferraris et al. 2017:[14] [ref. 35236], Taphorn & Lasso in Lasso & Morales-Betancourt 2022:82 [ref. 40783], Ochoa et al. 2025:549 [ref. 42411]). Current status: Valid as Sternarchorhynchus marreroi de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: South America: Apure River drainage, lower Orinoco River basin, Venezuela. Habitat: freshwater.

mendesi, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:320, Fig. 56 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Morichal Largo, Río Guanipa, 5 kilometers south of Aguasay (Aguasay is 9°25'N, 63°44'W), Golfo de Paria drainage, Department of Marurín, Monagas,, Venezuela. Holotype: MCNG 29129. Paratypes: INHS 31374 (3), 31453 (1); MCNG 29166 (1) 29194 (1), 55850 [ex. MCNG 29129] (1) Type catalog: Ferraris et al. 2017:[14] [ref. 35236]. •Valid as Sternarchorhynchus mendesi de Santana & Vari 2010 -- (Ferraris et al. 2017:[14] [ref. 35236], Ochoa et al. 2025:549 [ref. 42411]). Current status: Valid as Sternarchorhynchus mendesi de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: South America: San Juan River and Guanipa River basins, Gulf of Paria drainage, Venezuela. Habitat: freshwater.

mesensis, Sternarchorhynchus Campos-da-Paz [R.] 2000:531, Figs. 6, 10 [Copeia 2000 (no. 2); ref. 24452] Rio Tocantins (upper River Tocantins region), at Serra da Mesa dam, municípios Minaçu/Uruaçu, about 13°50'S, 48°19'W, Goiás, Brazil. Holotype: MNRJ 17591. Paratypes: MCP 21122 (1); MNRJ 11611 (4, c&s), 11612 (11, 1 c&s), 11613 (7); MZUSP 57597 (1). Plus non-type material. Type catalog: Ferraris et al. 2017:[14] [ref. 35236]. •Valid as Sternarchorhynchus mesensis Campos-da-Paz 2000 -- (Albert 2001:112 [ref. 25614] as mesaensis, Albert in Reis et al. 2003:501 [ref. 27061], de Santana & Crampton 2006:58 [ref. 28619], de Santana & Nogueira 2006:85 [ref. 28638], de Santana & Vari 2010:322 [ref. 30785], Ferraris et al. 2017:[14] [ref. 35236]). Current status: Valid as Sternarchorhynchus mesensis Campos-da-Paz 2000. Apteronotidae: Apteronotinae. Distribution: Upper Tocantins River basin, Brazil. Habitat: freshwater.

montanus, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:324, Fig. 59 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Río Marañon, pongo above Borja, 35.5 kilometers northeast of Juan Velasco, Santa Maria de Nieva (4°27'36"S, 77°34'53"W), Amazonas, Peru. Holotype: MUSM 31312. Paratypes: UF uncat. (2). Plus non-type specimens. Type catalog: Ferraris et al. 2017:[14] [ref. 35236]. •Valid as Sternarchorhynchus montanus de Santana & Vari 2010 -- (Barriga Salazar 2014:116 [ref. 35745], Ferraris et al. 2017:[14] [ref. 35236], Meza-Vargas et al. 2021:21 [ref. 39298]). Current status: Valid as Sternarchorhynchus montanus de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: South America: Amazon basin (Ecuador and Peru). Habitat: freshwater.

mormyrus, Sternarchus Steindachner [F.] 1868:176 [Anzeiger der Kaiserlichen Akademie der Wissenschaften, Wien, Mathematisch-Naturwissenschaftliche Classe v. 5 (no. 20) (for 23 July 1868); ref. 20464] Maribitanos, Brazil. Syntypes: (several) NMW 65336 (1), 65345 (1). Type catalog: Ferraris et al. 2017:[14] [ref. 35236]. Species was later illustrated and described in more detail in Steindachner 1868:253, Pl. 1 (fig. 3) [ref. 14082]. •Valid as Sternarchorhynchus mormyrus (Steindachner 1868) -- (Mago-Leccia 1994:37 [ref. 21320], Campos-da-Paz 2000:528 [ref. 24452], Albert 2001:112 [ref. 25614], Albert in Reis et al. 2003:501 [ref. 27061], de Santana & Crampton 2006:58 [ref. 28619], de Santana & Nogueira 2006:85 [ref. 28638], de Santana & Vari 2010:326 [ref. 30785], Barriga Salazar 2014:116 [ref. 35745], DoNascimiento et al. 2017:68 [ref. 35633], Ferraris et al. 2017:[14] [ref. 35236], Bernt et al. 2018:475 [ref. 35797], Meza-Vargas et al. 2021:21 [ref. 39298], Taphorn & Lasso in Lasso & Morales-Betancourt 2022:84 [ref. 40783], Torgersen et al. 2023:777 [ref. 40692], Ochoa et al. 2025:549 [ref. 42411]). Current status: Valid as Sternarchorhynchus mormyrus (Steindachner 1868). Apteronotidae: Apteronotinae. Distribution: South America: Amazon and Orinoco river basins (Brazil, Peru, Ecuador, Colombia and Venezuela). Habitat: freshwater.

mulleri, Sternarchorhynchus Castelnau [F. L.] 1855:95 [Animaux nouveaux or rares v. 2; ref. 766] Essequibo River, Guyana [probably in error]. No types known. Unneeded new name for Sternarchorhynchus oxyrhynchus (Müller & Troschel 1849). For problems with the type locality, see de Santana & Vari 2010:333 [ref. 30785]. •Objective synonym of Sternarchorhynchus oxyrhynchus (Müller & Troschel 1849) -- (Mago-Leccia 1994:36 [ref. 21320], Albert in Reis et al. 2003:501 [ref. 27061], de Santana & Vari 2010:331 [ref. 30785], Ferraris et al. 2017:[14] [ref. 35236]). Current status: Synonym of Sternarchorhynchus oxyrhynchus (Müller & Troschel 1849). Apteronotidae: Apteronotinae. Habitat: freshwater.

oxyrhynchus, Sternarchus Müller [J.] & Troschel [F. H.] 1849:640 [Reisen in Britisch-Guiana; ref. 3072] Essequibo River, Guyana [probably in error]. Holotype (unique): ZMB 4086. Type catalog: Ferraris et al. 2017:[14] [ref. 35236] with date as 1848. For problems with the type locality, see de Santana & Vari 2010:333 [ref. 30785]. Also described in Müller & Troschel 1849:16, pl. 2 (figs. 1-2) [ref. 3073]. •Valid as Sternarchorhynchus oxyrhynchus (Müller & Troschel 1849) -- (Ovchynnyk 1967:33 [ref. 37559], Ortega & Vari 1986:12 [ref. 9708], Mago-Leccia 1994:36 [ref. 21320], Albert & Campos-da-Paz 1998:423 [ref. 23853], Campos-da-Paz 2000:528 [ref. 24452], Albert 2001:112 [ref. 25614], Albert in Reis et al. 2003:501 [ref. 27061], de Santana & Crampton 2006:58 [ref. 28619], de Santana & Vari 2010:330 [ref. 30785], Sarmiento et al. 2014:188 [ref. 35004], DoNascimiento 2016:535 [ref. 34727], Ferraris et al. 2017:[14] [ref. 35236] as 1848, DoNascimiento et al. 2017:68 [ref. 35633], Urbano-Bonilla et al. 2018:72 [ref. 35773], Ochoa et al. 2020:63 [ref. 37781], Meza-Vargas et al. 2021:21 [ref. 39298], Lasso et al. in Lasso & Morales-Betancourt 2022:86 [ref. 40783]). Current status: Valid as Sternarchorhynchus oxyrhynchus (Müller & Troschel 1849). Apteronotidae: Apteronotinae. Distribution: South America: Orinoco River basin (Bolivia, Colombia, Peru and Venezuela); ?Guyana. Habitat: freshwater.

retzeri, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:334, Figs. 64-65 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Rio Téfe, Toco Preto, Tefé (3°47'19"S, 64°59'54"W), Amazonas, Brazil. Holotype: MCP 42636. Paratypes: MCP 41635 (10). Plus non-type speciimens. Type catalog: Ferraris et al. 2017:[14] [ref. 35236]. •Valid as Sternarchorhynchus retzeri de Santana & Vari 2010 -- (Ferraris et al. 2017:[14] [ref. 35236], Meza-Vargas et al. 2021:21 [ref. 39298]). Current status: Valid as Sternarchorhynchus retzeri de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: South America: broadly distributed in Amazon River basin (Brazil and Peru). Habitat: freshwater.

roseni, Sternarchorhynchus Mago-Leccia [F.] 1994:99, Fig. 92 [Electric fishes of the continental waters of America; ref. 21320] Río Apure at Jarina, near San Fernando de Apure, Río Orinoco basin, Apure, Venezuela. Holotype: MBUCV-V-20037. Paratypes: AMNH 58665 (2), MBUCV-V-5491 (1), V-7562 (1), V-10411 (1), V-10622 (1), V-12201 (3), V-15697 (1), V-15722 (1), V-15807-11 (7 not 5, 2, 6, 1, 1), V-15813 (1), V-19839 (8), V-20025 (2), V-20066 (1). Type catalog: Provenzano et al. 1998:18 [ref. 24196], Ferraris et al. 2017:[14] [ref. 35236]. •Valid as Sternarchorhynchus roseni Mago-Leccia 1994 -- (Campos-da-Paz 2000:528 [ref. 24452], Albert 2001:112 [ref. 25614], Albert in Reis et al. 2003:501 [ref. 27061], de Santana & Crampton 2006:58 [ref. 28619], de Santana & Nogueira 2006:85 [ref. 28638], de Santana & Vari 2010:336 [ref. 30785], Ferraris et al. 2017:[14] [ref. 35236], DoNascimiento et al. 2017:68 [ref. 35633], Urbano-Bonilla et al. 2018:72 [ref. 35773], Lasso & Taphorn in Lasso & Morales-Betancourt 2022:88 [ref. 40783], Ochoa et al. 2025:548 [ref. 42411]). Current status: Valid as Sternarchorhynchus roseni Mago-Leccia 1994. Apteronotidae: Apteronotinae. Distribution: South America: Orinoco River basin (Colombia and Venezuela). Habitat: freshwater.

schwassmanni, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:341, Fig. 69 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Rio Araguaia, small stream between Rio João do Araguaia (5°23'S, 48°46'W) and São Bento (5°28'S, 48°20'W), Pará, Brazil. Holotype: MHNG 95633 [ex MHNG 2566.093]. Paratypes: MHNG 2566.093 (1). Type catalog: Ferraris et al. 2017:[15] [ref. 35236]. •Valid as Sternarchorhynchus schwassmanni de Santana & Vari 2010 -- (Ferraris et al. 2017:[15] [ref. 35236]). Current status: Valid as Sternarchorhynchus schwassmanni de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: Araguaia River, Brazil. Habitat: freshwater.

severii, Sternarchorhynchus de Santana [C. D.] & Nogueira [A.] 2006:86, Figs. 1a, 2a [Ichthyological Exploration of Freshwaters v. 17 (no. 1); ref. 28638] Rio Mucajaí, below Cachoeira Paredão 2, Roraima, Brazil. Holotype: INPA 22893. Paratypes: INPA 22898 (13, 2 c&s). Type catalog: Ferraris et al. 2017:[15] [ref. 35236]. Name appeared first in an earlier paper in the same journal issue: de Santana & Taphorn 2006:3 [ref. 28632]. •Valid as Sternarchorhynchus severii de Santana & Nogueira 2006 -- (de Santana & Vari 2010:342 [ref. 30785], Ferraris et al. 2017:[15] [ref. 35236]). Current status: Valid as Sternarchorhynchus severii de Santana & Nogueira 2006. Apteronotidae: Apteronotinae. Distribution: Mucajaí River, Brazil. Habitat: freshwater.

starksi, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:344, Fig. 71 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Rio Pará between Rio Boa Vista and Rio Tocantins, between towns of Boa Vista and Abaetetuba (1°45'30"S., 49°29'17"W), Pará, Brazil. Holotype: INPA 28377 [ex. FMNH 115485]. Paratypes: CAS-SU 22193 (10), MZUSP 58196 (1), USNM 52542 (2). Plus non-type specimens. Type catalog: Ferraris et al. 2017:[15] [ref. 35236]. •Valid as Sternarchorhynchus starksi de Santana & Vari 2010 -- (Ferraris et al. 2017:[15] [ref. 35236]). Current status: Valid as Sternarchorhynchus starksi de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: Lower Amazon River, Brazil. Habitat: freshwater.

stewarti, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:346, Fig. 72 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Río Marañon, log riffle, 1.57 kilometers east-north-east of Juan Velasco Santa Maria de Nieva (4°50'S, 77°51'W), Amazonas, Peru. Holotype: MUSM 30409. Paratypes: many at ANSP, AUM, CUMV, UF, MUSM, USNM. Plus non-type specimens. Type catalog: Ferraris et al. 2017:[15] [ref. 35236]. •Valid as Sternarchorhynchus stewarti de Santana & Vari 2010 -- (Barriga Salazar 2014:116 [ref. 35745], Ferraris et al. 2017:[15] [ref. 35236], Meza-Vargas et al. 2021:21 [ref. 39298], Chuctaya et al. 2022:33 [ref. 42137]). Current status: Valid as Sternarchorhynchus stewarti de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: South America: upper Amazon basin (Ecuador and Peru). IUCN (2016): Least Concern. Habitat: freshwater.

taphorni, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:349, Fig. 74 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Río Huallaga, Uchiza (ca. 8°29'59"S, 76°22'59"W), Departamento de San Martin, Peru. Holotype: MUSM 6635. Paratypes: ROM 55530 (1), 55531 (1). Type catalog: Ferraris et al. 2017:[15] [ref. 35236]. •Valid as Sternarchorhynchus taphorni de Santana & Vari 2010 -- (Ferraris et al. 2017:[15] [ref. 35236], Chuctaya et al. 2022:33 [ref. 42137]). Current status: Valid as Sternarchorhynchus taphorni de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: South America: Huallaga River and left bank tributaries of Ucayali River basin (Peru). IUCN (2016): Least Concern. Habitat: freshwater.

villasboasi, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:354, Fig. 77 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Cochoeira de Kaituká, at Altamira (3°12'S, 52°12'W), Rio Xingu, Pará, Brazil. Holotype: INPA 28361. Paratypes: INPA 3934 (1), 32084 (1). Type catalog: Ferraris et al. 2017:[15] [ref. 35236]. •Valid as Sternarchorhynchus villasboasi de Santana & Vari 2010 -- (Ferraris et al. 2017:[15] [ref. 35236]). Current status: Valid as Sternarchorhynchus villasboasi de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: Xingu River, Brazil. Habitat: freshwater.

yepezi, Sternarchorhynchus de Santana [C. D.] & Vari [R. P.] 2010:351, Figs. 75-76 [Zoological Journal of the Linnean Society v. 159 (no. 1); ref. 30785] Río Portuguesa, fort at Nueva Florida, Santa Rosalía (ca. 8°57'N, 69°01'W), Portuguesa, Venezuela. Holotype: MCNG 44286. Paratypes: ANSP 165222 (2). Plus one non-type specimen. Type catalog: Ferraris et al. 2017:[15] [ref. 35236]. •Valid as Sternarchorhynchus yepezi de Santana & Vari 2010 -- (Ferraris et al. 2017:[15] [ref. 35236], Lasso in Lasso & Morales-Betancourt 2022:90 [ref. 40783], Ochoa et al. 2025:549 [ref. 42411]). Current status: Valid as Sternarchorhynchus yepezi de Santana & Vari 2010. Apteronotidae: Apteronotinae. Distribution: South America: central portions of Orinoco River (Venezuela); ?Amazon River (Peru). Habitat: freshwater.