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

Species in the genus Oligosarcus: [ 27 ] records

acutirostris, Oligosarcus Menezes [N. A.] 1990:15, Fig. 3 [Boletim de Zoologia, Universidad de São Paulo v. II [for 1987]; ref. 20060] Rio Itapemirim, Fazenda Boa Esperança, between Pacotuba and Coutinho, Espirito Santo, about 21°S, 41°W, Brazil. Holotype: MZUSP 37525. Paratypes: MZUSP 1686 and 4772-4782 (12), 1795 and 4783 (2), 2798 and 4796-4800 and 37563-37567 (11); USNM 289217-18 (5, 3); plus more paratypes at MZUSP. Type catalog: Oyakawa 1996:485 [ref. 23140]. •Valid as Oligosarcus acutirostris Menezes 1990 -- (Menezes in Reis et al. 2003:151 [ref. 27061], Ribeiro et al. 2007:52 [ref. 29321], Menezes & Ribeiro 2010:653 [ref. 30976], Ribeiro & Menezes 2015:76 [ref. 33768], Petry et al. 2016:302 [ref. 34966], Wendt et al. 2019:5 [ref. 36952], Silva et al. 2020:6 [ref. 37809], Menezes & Camelier 2024:242 [ref. 40817] dated 1987, Sarmento-Soares et al. 2024:557 [ref. 42662], Vieira-Guimarães et al. 2024:39 [ref. 41258]). Current status: Valid as Oligosarcus acutirostris Menezes 1990. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: eastern coastal rivers, between Espírito Santo and Bahia States (Brazil). IUCN (2022): Least Concern. Habitat: freshwater.

amome, Oligosarcus Almirón [A. E.], Casciotta [J. R.], Piálek [L.], Doubnerová [K.] & Říčan [O.] 2015:582, Figs. 1-4 [Zootaxa 3915 (no. 1); ref. 33673] Misiones Province: río Uruguay basin, arroyo Oveja Negra, tributary of Arroyo Yabotí-Guazú, Argentina, 27°08'15.5"S, 53°55'28.8"W. Holotype: MLP 10679. Paratypes: MACN-ict, MLP. Type catalog: Nadalin & López 2015:5 [ref. 34112]. •Placement in Oligosarcus is controversial -- (Riveiro & Menezes 2015:41 [ref. 33768]). •Valid as Oligosarcus amome Almirón, Casciotta, Piálek, Doubnerová & Říčan 2015 -- (Mirande & Koerber 2015:25 [ref. 35117], Menezes & Camelier 2024:243 [ref. 40817]). Current status: Valid as Oligosarcus amome Almirón, Casciotta, Piálek, Doubnerová & Říčan 2015. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: upper Uruguay River basin, Argentina. Habitat: freshwater.

argenteus, Oligosarcus Günther [A.] 1864:353 [Catalogue of the fishes in the British Museum v. 5; ref. 1974] Brazil. Syntypes: BMNH 1967.1.24.1-2 (2). •Valid as Oligosarcus argenteus Günther 1864 -- (Menezes & Géry 1983:589 [ref. 8307], Menezes 1987:22 [ref. 20060], Menezes in Reis et al. 2003:151 [ref. 27061], Ribeiro et al. 2007:52 [ref. 29321], Ribeiro & Menezes 2015:77 [ref. 33768], Azevedo-Santos et al. 2019:5 [ref. 36506], Wendt et al. 2019:5 [ref. 36952], Menezes & Camelier 2024:243 [ref. 40817], Vieira-Guimarães et al. 2024:39 [ref. 41258]). Current status: Valid as Oligosarcus argenteus Günther 1864. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Doce, Das Velhas and upper Paraná River basins, Brazil. Habitat: freshwater.

bolivianus, Acestrorhamphus Fowler [H. W.] 1940:53, Figs. 7-8 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 92; ref. 1436] Former farm ‘Monte Bello’, río Lipeo approximately 2 km upstream from confluence with río Bermejo, Lipeo hamlet, Los Toldos municipality, Santa Victoria department, Salta Province, Argentina. 22°26'50"S, 64°32'54"W. Holotype: ANSP 68814. Paratypes: ANSP 68815-31 (17), 79790 (7). Type catalog: Böhlke 1984:43 [ref. 13621]. Type locality changed from Bolivia to Argentina; see Mirande & Koerber 2015 [ref. 33698], Koerber 2022:107 [ref. 39426]. •Valid as Oligosarcus bolivianus (Fowler 1940) -- (Menezes & Géry 1983:589 [ref. 8307], Menezes 1987:26 [ref. 20060], Braga 1994:20 [ref. 27878], Menezes in Reis et al. 2003:151 [ref. 27061], López et al. 2003:28 [ref. 27366], Menni 2004:74 [ref. 28131], Ribeiro et al. 2007:52 [ref. 29321], Mirande 2010:497 [ref. 31006], Sarmiento et al. 2014:185 [ref. 35004], Almirón et al. 2015:589 [ref. 33673], Ribeiro & Menezes 2015:77 [ref. 33768], Mirande & Koerber 2015:25 [ref. 35117], Wendt et al. 2019:5 [ref. 36952], Menezes & Camelier 2024:243 [ref. 40817]). Current status: Valid as Oligosarcus bolivianus (Fowler 1940). Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Lipeo River drainage, Paraguay River basin, Argentina and Bolivia. Habitat: freshwater.

brachycephalus, Xiphorhamphus Cope [E. D.] 1894:84, Pl. 4 [Proceedings of the American Philosophical Society v. 33; ref. 965] Rio Grande do Sul, Brazil. Lectotype: ANSP 21728. Paralectotypes: ANSP 21917 (1). Type catalog: Böhlke 1984:44 [ref. 13621] as holotype and paratype. Lectotype established by Fowler 1907:460 [ref. 1374]. •Synonym of Oligosarcus jenynsii (Günther 1864) -- (Menezes 1987:24 [ref. 20060], Malabarba 1989:137 [ref. 14217], Braga 1994:22 [ref. 27878], Menezes in Reis et al. 2003:151 [ref. 27061], Litz & Koerber 2014:15 [ref. 33622], Mirande & Koerber 2015:25 [ref. 35117], Menezes & Camelier 2024:243 [ref. 40817]). Current status: Synonym of Oligosarcus jenynsii (Günther 1864). Acestrorhamphidae: Acestrorhamphinae. Habitat: freshwater.

brevioris, Oligosarcus Menezes [N. A.] 1990:10, Fig. 2 [Boletim de Zoologia, Universidad de São Paulo v. II [for 1987]; ref. 20060] Arroio Cachoeirinha, bacia do Rio Pelotas, Munic. Vacaria, Rio Grande do Sul, about 28°40'S, 50°40'W, Brazil. Holotype: MZUSP 37508. Paratypes: MCP 6486 (17), 10968 (5); MZUSP 36489 (19), 36492-93 (4, 2); USNM 278960 (17), 278965 (2). Type catalog: Oyakawa 1996:486 [ref. 23140]. •Valid as Oligosarcus brevioris Menezes 1990 -- (Braga 1994:19 [ref. 27878], Gómez & Chebez 1996:48 [ref. 23791], Miquelarena et al. 2002:76 [ref. 26517], Menezes in Reis et al. 2003:151 [ref. 27061], López et al. 2003:29 [ref. 27366], Menni 2004:74 [ref. 28131], Ribeiro et al. 2007:52 [ref. 29321], Litz & Koerber 2014:15 [ref. 33622], Almirón et al. 2015:589 [ref. 33673], Ribeiro & Menezes 2015:77 [ref. 33768], Mirande & Koerber 2015:25 [ref. 35117], Bertaco et al. 2016:414 [ref. 34561], Wendt et al. 2019:5 [ref. 36952], Menezes & Camelier 2024:243 [ref. 40817] dated 1987). Current status: Valid as Oligosarcus brevioris Menezes 1990. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: upper Uruguay River basin, Argentina and Brazil. Habitat: freshwater.

hepsetus, Hydrocyon Cuvier [G.] 1829:312 [Le Règne Animal (Edition 2) v. 2; ref. 995] No locality stated [Rio de Janeiro, Brazil]. Non-types: MNHN A-9851 (3, poor condition) Buenos Aires. Type catalog: Bertin 1948:7-8 [ref. 19577] but dated to Valenciennes 1847. On Quoy & Gaimard 1824-25, pl. 48 (fig. 2) [ref. 3574]. •Valid as Acestrorhampus hepsetus (Cuvier 1829) -- (Haro et al. 1996:6 [ref. 25004]). •Valid as Oligosarcus hepsetus (Cuvier 1829) -- (Menezes & Géry 1983:589 [ref. 8307], Menezes 1987:31 [ref. 20060], Gómez & Chebez 1996:47 [ref. 23791], Menezes in Reis et al. 2003:151 [ref. 27061], Ribeiro et al. 2007:52 [ref. 29321], Di Dario et al. 2013:262 [ref. 37503], Catelani et al. 2014:931 [ref. 37496], Litz & Koerber 2014:15 [ref. 33622], Ribeiro & Menezes 2015:77 [ref. 33768], Mirande & Koerber 2015:25 [ref. 35117], Petry et al. 2016:302 [ref. 34966], Nión et al. 2016:28 [ref. 35565] with author as Steindachner 1867, Wendt et al. 2019:5 [ref. 36952], Koerber & Serra 2020:4 [ref. 37449], Mirande & Koerber 2020:2 [ref. 37594], Menezes & Camelier 2024:243 [ref. 40817], Sarmento-Soares et al. 2024:557 [ref. 42662]). Current status: Valid as Oligosarcus hepsetus (Cuvier 1829). Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Rio de Janeiro south to Laguna dos Patos (southeastern Brazil). IUCN (2023): Least Concern. Habitat: freshwater, brackish.

itau, Oligosarcus Mirande [J. M.], Aguilera [G.] & Azpelicueta [M. de las M.] 2011:4, Figs. 1-6 [Zootaxa No. 2994; ref. 31465] Río Bermejo basin, small tributary to Río Itau, near Campo Largo, 22°01'34"S, 63°56'06"W, General San Martín, Salta, Argentina, elevation 690 meters. Holotype: CI-FML 3856. Paratypes: CI-FML 3857 (1), 3858 (1 c&s). •Placement in Oligosarcus is controversial -- (Riveiro & Menezes 2015:41 [ref. 33768]). •Valid as Oligosarcus itau Mirande, Aguilera & Azpelicueta 2011 -- (Koerber 2014:5 [ref. 33621], Sarmiento et al. 2014:185 [ref. 35004], Mirande & Koerber 2015:25 [ref. 35117], Cancino et al. 2024:143 [ref. 41222], Menezes & Camelier 2024:243 [ref. 40817]). Current status: Valid as Oligosarcus itau Mirande, Aguilera & Azpelicueta 2011. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Bermejo River drainage (Argentina and Bolivia). Habitat: freshwater.

jacuiensis, Oligosarcus Menezes [N. A.] & Ribeiro [A. C.] 2010:650, Figs. 1-2a [Neotropical Ichthyology v. 8 (no. 3); ref. 30976] Estrela Velha, rio Jacuí, 29°15'46"S, 53°14'05"W, Rio Grande do Sul, Brazil. Holotype: MCP 28980. Paratypes: MCP 18876 (6), 26979 (13), 37930 (4), 44405 (8); MZUSP 104604 (4). •Valid as Oligosarcus jacuiensis Menezes & Ribeiro 2010 -- (Ribeiro & Menezes 2015:77 [ref. 33768], Menezes & Ribeiro 2015:545 [ref. 33973], Bertaco et al. 2016:414 [ref. 34561], Wendt et al. 2019:5 [ref. 36952], Menezes & Camelier 2024:243 [ref. 40817]). Current status: Valid as Oligosarcus jacuiensis Menezes & Ribeiro 2010. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Uruguay and Jacuí River basins, southern Brazil. Habitat: freshwater.

jenynsii, Xiphorhamphus Günther [A.] 1864:356 [Catalogue of the fishes in the British Museum v. 5; ref. 1974] Freshwater Lake of Maldonado, Uruguay [probably Laguna del Diario, 34°54'S, 55°00'W, Maldonado, Uruguay]. Holotype: UMZC [Darwin no. 661] whereabouts unknown. Based on Hydrocyon hepsetus of Jenyns 1840:129 [ref. 2344] (not of Cuvier). •Valid as Oligosarcus jenynsii (Günther 1864) -- (Menezes & Géry 1983:589 [ref. 8307], Menezes 1987:22 [ref. 20060], Malabarba 1989:137 [ref. 14217], Haro et al. 1996:6 [ref. 25004] as jenynsi, Gómez & Chebez 1996:47 [ref. 23791], Miquelarena et al. 1997:68 [ref. 23469], Butí & Cancino 1999:71 [ref. 25277], López et al. 2002:63 [ref. 26808] as jenynsi, Menezes in Reis et al. 2003:151 [ref. 27061], López et al. 2003:29 [ref. 27366], Casciotta et al. 2003:87 [ref. 28130], Menni 2004:74 [ref. 28131] as jenynsi, Ribeiro et al. 2007:52 [ref. 29321], Menezes & Ribeiro 2010:653 [ref. 30976], Mirande 2010:497 [ref. 31006] as cf. jenynsii, Mabragaña et al. 2011:table S2 [ref. 31800], Fabiano et al. 2014:8 [ref. 33530], Litz & Koerber 2014:15 [ref. 33622], Sarmiento et al. 2014:185 [ref. 35004], Almirón et al. 2015:589 [ref. 33673], Ribeiro & Menezes 2015:77 [ref. 33768], Menezes & Ribeiro 2015:545 [ref. 33973], Mirande & Koerber 2015:25 [ref. 35117], Bertaco et al. 2016:414 [ref. 34561], Petry et al. 2016:302 [ref. 34966], Nión et al. 2016:28 [ref. 35565] as jenynsi, Wendt et al. 2019:5 [ref. 36952], Koerber & Serra 2020:1 [ref. 37449], dos Reis et al. 2020:459 [ref. 38364], Giora & Wingert 2023:75 [ref. 41026], Loureiro et al. 2023:70 [ref. 40506], Gomes et al. 2024:24 [ref. 42631], Menezes & Camelier 2024:243 [ref. 40817]). Current status: Valid as Oligosarcus jenynsii (Günther 1864). Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: coastal areas and interior plains of Rio Grande do Sul State and Paraná River basin (Argentina, Brazil, Bolivia and Uruguay). IUCN (2023): Least Concern. Habitat: freshwater.

longirostris, Oligosarcus Menezes [N. A.] & Géry [J.] 1983:576, Fig. 4 [Revue Suisse de Zoologie v. 90 (no. 3); ref. 8307] Rio Iguaçu (Paraná basin) at Porto Lupion, Paraná State, Brazil. Holotype: MZUSP 25841. Paratypes: MHNG 2098.8-9 (2), MZUSP 25842-48 (7), USNM 228080 (2). Type catalog: Vari & Howe 1991:32 [ref. 19022], Oyakawa 1996:486 [ref. 23140]. Not treated in Menezes in Reis et al. 2003:152 [ref. 27061], added in Corrigenda (2005). •Valid as Oligosarcus longirostris Menezes & Géry 1983 -- (Menezes 1987:28 [ref. 20060], Braga 1994:18 [ref. 27878], Gómez & Chebez 1996:47 [ref. 23791], López et al. 2003:29 [ref. 27366], Casciotta et al. 2003:88 [ref. 28130], Menni 2004:74 [ref. 28131], Ribeiro et al. 2007:52 [ref. 29321], Almirón et al. 2015:589 [ref. 33673], Ribeiro & Menezes 2015:77 [ref. 33768], Mirande & Koerber 2015:25 [ref. 35117], Wendt et al. 2019:5 [ref. 36952], dos Reis et al. 2020:459 [ref. 38364], Menezes & Camelier 2024:244 [ref. 40817]). Current status: Valid as Oligosarcus longirostris Menezes & Géry 1983. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Iguaçu River basin (Argentina and Brazil). Habitat: freshwater.

macrolepis, Xiphorhamphus Steindachner [F.] 1877:594 [36] [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 74 (1. Abth.); ref. 4224] Rio Jequitinhonha, Brazil. Syntype: (one ?) not yet found at NMW. On p. 36 of separate. •Valid as Oligosarcus macrolepis (Steindachner 1877) -- (Menezes 1987:21 [ref. 20060], Menezes in Reis et al. 2003:151-152 [ref. 27061], Ribeiro et al. 2007:52 [ref. 29321], Ribeiro & Menezes 2015:78 [ref. 33768], Wendt et al. 2019:5 [ref. 36952], Silva et al. 2020:7 [ref. 37809], Menezes & Camelier 2024:244 [ref. 40817], Vieira-Guimarães et al. 2024:39 [ref. 41258]). Current status: Valid as Oligosarcus macrolepis (Steindachner 1877). Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Jequitinhonha River basin (Brazil). Habitat: freshwater.

marciae, Hemibrycon Godoy [M. P. de] 1971:155, Figs. 1-4 [Revista Brasileira de Biologia v. 31 (no. 2); ref. 7670] Cachoeira de Emas, Rio Mogi Guassu, São Paulo State, Brazil. Holotype: EEBP 710 [not found]. Paratypes: (54). •Synonym of Oligosarcus pintoi Amaral Campos 1945 -- (Menezes 1987:21 [ref. 20060], Menezes in Reis et al. 2003:151 [ref. 27061], Koerber et al. 2017:39 [ref. 35267], Menezes & Camelier 2024:244 [ref. 40817]). Current status: Synonym of Oligosarcus pintoi Amaral Campos 1945. Acestrorhamphidae: Acestrorhamphinae. Habitat: freshwater.

meadi, Oligosarcus Menezes [N. A.] 1969:31, 117, Fig. 21 [Arquivos de Zoologia (São Paulo) v. 18 (nos 1-2); ref. 7834] União de Caeté, Minas Gerais, Río das Velhas basin, Uruguay. Holotype: DZSASP 4618. Paratypes: DZSASP 4614-15 (3), 4718-19 (2); MCZ 45859 [ex DZSASP] (2). Type catalog: Oyakawa 1996:486-487 [ref. 23140]. •Valid as Oligosarcus meadi Menezes 1969 -- (Menezes & Géry 1983:589 [ref. 8307]). •Synonym of Oligosarcus argenteus Günther 1864 -- (Menezes 1987:22 [ref. 20060], Menezes in Reis et al. 2003:151 [ref. 27061], Menezes & Camelier 2024:243 [ref. 40817]). Current status: Synonym of Oligosarcus argenteus Günther 1864. Acestrorhamphidae: Acestrorhamphinae. Habitat: freshwater.

menezesi, Oligosarcus Miquelarena [A. M.] & Protogino [L. C.] 1996:112, Fig. [Iheringia, Série Zoologia (Porto Alegre) No. 80; ref. 23181] Upper Urugua-í creek, upper Río Paraná system, Misiones, Argentina, 25°57'S, 54°07'W. Holotype: CFA-IC 10299 [ex ILPLA 299]. Paratypes: CFA-IC 10300-10306 [ex ILPLA 300-306] (2, 1, 2, now 3, 1, 4, 4), MZUSP 48000-02 (3, 2, 3); MLP 10486 (3). Type catalog: Koerber 2007:1 [ref. 29776], Miquelarena et al. 2009:78-80 [ref. 34389], Miquelarena & Nadalin 2014:10 [ref. 33466], Bogan et al. 2019:15 [ref. 37088]. •Valid as Oligosarcus menezesi Miquelarena & Protogino 1996 -- (Miquelarena et al. 1997:68 [ref. 23469], López et al. 2002:61 [ref. 26808], Menezes in Reis et al. 2003:152 [ref. 27061], López et al. 2003:29 [ref. 27366], Menni 2004:74 [ref. 28131], Ribeiro et al. 2007:52 [ref. 29321], Almirón et al. 2015:589 [ref. 33673], Ribeiro & Menezes 2015:78 [ref. 33768], Mirande & Koerber 2015:25 [ref. 35117], Menezes & Camelier 2024:244 [ref. 40817]). Current status: Valid as Oligosarcus menezesi Miquelarena & Protogino 1996. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Paraná River basin (Argentina). Habitat: freshwater.

oligolepis, Xiphoramphus Steindachner [F.] 1867:339 [33] [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 56 (1. Abth.); ref. 14188] Río de la Plata, Argentina. Holotype (unique): NMW. On p. 33 of separate. •Valid as Oligosarcus oligolepis (Steindachner 1867) -- (Menezes 1987:28 [ref. 20060], Braga 1994:16 [ref. 27878], Sverlij et al. 1998:13 [ref. 27632], López et al. 2003:29 [ref. 27366], Menezes in Reis et al. 2003:152 [ref. 27061], Menni 2004:74 [ref. 28131], Ribeiro et al. 2007:52 [ref. 29321], Litz & Koerber 2014:15 [ref. 33622], Almirón et al. 2015:589 [ref. 33673], Ribeiro & Menezes 2015:78 [ref. 33768], Bertaco et al. 2016:414 [ref. 34561], Koerber et al. 2017:38 [ref. 35267], Wendt et al. 2019:5 [ref. 36952], Koerber & Serra 2020:1 [ref. 37449], Loureiro et al. 2023:70 [ref. 40506], Menezes & Camelier 2024:244 [ref. 40817]). Current status: Valid as Oligosarcus oligolepis (Steindachner 1867). Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Paraguay, lower Paraná, Uruguay and La Plata River basins (Argentina, Brazil, Paraguay and Uruguay). Habitat: freshwater.

paranensis, Oligosarcus Menezes [N. A.] & Géry [J.] 1983:572, Fig. 3 [Revue Suisse de Zoologie v. 90 (no. 3); ref. 8307] Represa de Salesópolis (Tietê River system), São Paulo State, Brazil. Holotype: MZUSP 25721. Paratypes: MHNG 2098.2-7 (6); MNHN 1982-1111 and 1112 (1, 1); MZUSP 4713-14 (2), 1450 (1), 4685 (1), 4734 (1), 21085 (1), 21747 (1), 21768-71 (4), 21774-81 (8), 21796-97 (2), 21799-803 (5), 21805 (1), 21808-11 (4), 25722-85 (64), 25786 (1), 25787-803 (17), 25804-05 (1, 1), 25806-32 (27), 25833-40 (8), 36213 (1); USNM 228081-82 (5, 5). Type catalog: Vari & Howe 1991:32 [ref. 19022], Oyakawa 1996:487-488 [ref. 23140]. •Valid as Oligosarcus paranensis Menezes & Géry 1983 -- (Menezes 1987:27 [ref. 20060], Gómez & Chebez 1996:48 [ref. 23791], Miquelarena et al. 1997:68 [ref. 23469], Casatti et al. 2001:5 [ref. 25929], Menezes in Reis et al. 2003:152 [ref. 27061], López et al. 2003:29 [ref. 27366], Menni 2004:74 [ref. 28131], Ribeiro et al. 2007:52 [ref. 29321], Almirón et al. 2015:589 [ref. 33673], Ribeiro & Menezes 2015:78 [ref. 33768], Menezes & Ribeiro 2015:545 [ref. 33973], Mirande & Koerber 2015:25 [ref. 35117], Koerber et al. 2017:38 [ref. 35267], Azevedo-Santos et al. 2019:5 [ref. 36506], Wendt et al. 2019:5 [ref. 36952], Azevedo-Santos et al. 2020:5 [ref. 39606]. dos Reis et al. 2020:460 [ref. 38364], Brandão et al. 2023:99 [ref. 40464], Kampfert et al. 2025:281 [ref. 42023], Menezes & Camelier 2024:244 [ref. 40817], Silva-Sene et al. 2024:3 [ref. 41784]). Current status: Valid as Oligosarcus paranensis Menezes & Géry 1983. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: upper Paraná River basin (Argentina, Brazil and Paraguay). Habitat: freshwater.

perdido, Oligosarcus Ribeiro [A. C.], Cavallaro [M. R.] & Froehlich [O.] 2007:44, Figs. 1-4 [Zootaxa No. 1560; ref. 29321] Bridge over Rio Perdido, Harmonia farm, Munic. area of Porto Murtinho, Mato Grosso do Sul, Brazil, 21°17"07"S, 56°41'45"W. Holotype: MZUSP 94691. Paratypes: LIRP 5890 (2), 5891 (1), 5893 (1), 5894 (2), 5896 (5, 2 c&s). Plus non-type materiaal. •Valid as Oligosarcus perdido Ribeiro, Cavallaro & Froehlich 2007 -- (Ribeiro & Menezes 2015:78 [ref. 33768], Wendt et al. 2019:5 [ref. 36952], Menezes & Camelier 2024:244 [ref. 40817]). Current status: Valid as Oligosarcus perdido Ribeiro, Cavallaro & Froehlich 2007. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Apa River drainage, upper Paraguay River basin, Brazil. Habitat: freshwater.

pericoptes, Xiphorhamphus Müller [J.] & Troschel [F. H.] 1844:93 [Archiv für Naturgeschichte v. 10 (pt 1); ref. 3070] Brazil. No types known. Also in Müller & Troschel 1845:32, Pl. 5 [ref. 3071]. •Nomen dubium in genus Oligosarcus -- (Menezes 1987:32 [ref. 20060]). •Either a synonym of O. hepsetus or O. robustus -- (Menezes in Reis et al. 2003:152 [ref. 27061], Menezes & Camelier 2024:245 [ref. 40817]). •Questionably a synonym of Oligosarcus hepsetus (Cuvier 1829) -- (Litz & Koerber 2014:15 [ref. 33622], Mirande & Koerber 2015:25 [ref. 35117]). Nomen Dubium. Current status: Uncertain. Acestrorhamphidae: Acestrorhamphinae. Habitat: freshwater.

pintoi, Oligosarcus Amaral Campos [A.] 1945:456, Fig. 9 [Arquivos de Zoologia (São Paulo) v. 4 (no. 11); ref. 13139] Rio Mogi Guaçu, São Paulo State, Brazil. Holotype: MZUSP [ex DZSASP] 3465. Paratypes: MZUSP [ex DZSASP] 3488, 4653. Type catalog: Oyakawa 1996:488 [ref. 23140]. Also appeared in Amaral Campos 1945:480, Fig. 8 [ref. 106]. Type information: Britski 1969:200, 202 [ref. 12401] with holotype as not found. •Valid as Oligosarcus pintoi Amaral Campos 1945 -- (Menezes & Géry 1983:588 [ref. 8307], Menezes 1987:20 [ref. 20060], Casatti et al. 2001:5 [ref. 25929], Menezes in Reis et al. 2003:152 [ref. 27061], Ribeiro et al. 2007:52 [ref. 29321], Almirón et al. 2015:589 [ref. 33673], Ribeiro & Menezes 2015:78 [ref. 33768], Menezes & Ribeiro 2015:545 [ref. 33973], Koerber et al. 2017:39 [ref. 35267], Almirón et al. 2019:45 [ref. 37087], Wendt et al. 2019:5 [ref. 36952], Mirande & Koerber 2020:2 [ref. 37594], dos Reis et al. 2020:460 [ref. 38364], Kampfert et al. 2025:282 [ref. 42023], Menezes & Camelier 2024:244 [ref. 40817], Silva-Sene et al. 2024:3 [ref. 41784]). Current status: Valid as Oligosarcus pintoi Amaral Campos 1945. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: upper and middle Paraná River basin (Brazil, Paraguay and Argentina). Habitat: freshwater.

planaltinae, Oligosarcus Menezes [N. A.] & Géry [J.] 1983:564, Fig. 1 [Revue Suisse de Zoologie v. 90 (no. 3); ref. 8307] Córrego Planaltina, tributary of Rio São Bartolomeu, Rio Paraná system, near Brasìlia, Goiás State, Brazil, elevation 1050 meters. Holotype: MZUSP 25718. Paratypes: MHNG 2098.12 (1); ZSM 26092 (1), 26093 [ex ZSM 22657] (1); others at ZSM missing. Type catalog: Oyakawa 1996:488 [ref. 23140], Neumann 2011:246 [ref. 31652]. •Valid as Oligosarcus planaltinae Menezes & Géry 1983 -- (Menezes 1987:33 [ref. 20060], Menezes in Reis et al. 2003:152 [ref. 27061], Ribeiro et al. 2007:52 [ref. 29321], Ribeiro & Menezes 2015:78 [ref. 33768], Wendt et al. 2019:5 [ref. 36952], Menezes & Camelier 2024:244 [ref. 40817]). Current status: Valid as Oligosarcus planaltinae Menezes & Géry 1983. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Paranaíba River basin, Goiás State, Brazil. Habitat: freshwater.

platensis, Astyanacinus Messner [E.] 1962:5 [Boletin de la Asociacion Latino Americana de Ictiologos y Herpetologos v. 2 (no. 1); ref. 23528] Laguna Tropa Vieja, Canelones, Rio La Plata basin, Uruguay. Holotype (unique): MHNM CI 762. Type catalog: Olazarri et al. 1970:3 [ref. 23527]; see also Malabarba et al. 2004:99 [ref. 27836], Loureiro et al. 2016:412 [ref. 35150]. •Valid as Astyanacinus platensis Messner 1962 -- (Bertaco et al. 2010:266 [ref. 30864], Nión et al. 2016:29 [ref. 35565]). •Placement in Oligosarcus is controversial -- (Riveiro & Menezes 2015:41 [ref. 33768]). •Valid as Oligosarcus platensis (Messner 1962) -- (Mirande et al. 2011:16 [ref. 31465], Litz & Koerber 2014:15 [ref. 33622], Almirón et al. 2015:589 [ref. 33673], Loureiro et al. 2023:69 [ref. 40506], Menezes & Camelier 2024:244 [ref. 40817]). Current status: Valid as Oligosarcus platensis (Messner 1962). Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: La Plata River basin (Uruguay). Habitat: freshwater.

purpureus, Acestrorhamphus Messner [E.] 1962:1, Fig. [Comunicaciones Zoologicas del Museo de Historia Natural de Montevideo v. 7 (no. 95); ref. 6160] Río Olimar, near the mouth of A. de las Piedras, Uruguay. Holotype (unique): MHNM CI 79. Type catalog: Olazarri et al. 1970:3 [ref. 23527], Loureiro et al. 2016:412 [ref. 35150]. •Synonym of Oligosarcus jenynsii (Günther 1864) -- (Menezes 1987:24 [ref. 20060], Braga 1994:22 [ref. 27878], Menezes in Reis et al. 2003:151 [ref. 27061], Litz & Koerber 2014:15 [ref. 33622], Mirande & Koerber 2015:25 [ref. 35117], Menezes & Camelier 2024:244 [ref. 40817]). Current status: Synonym of Oligosarcus jenynsii (Günther 1864). Acestrorhamphidae: Acestrorhamphinae. Habitat: freshwater.

robustus, Oligosarcus Menezes [N. A.] 1969:26, 116, Fig. 18 [Arquivos de Zoologia (São Paulo) v. 18 (nos 1-2); ref. 7834] Rio Caí in Montenegro, Rio Grande do Sul, Rio Guaíba basin, Brazil. Holotype: DZSASP 4917. Paratypes: ANSP 21748 (1), 21918 (1); MZUSP [ex DZSASP] 4679-81 (3), 4692-93 (2), 4694 (1), 4696-4700 (5), 4917-20 (4); MCZ 849 (2), 20550 (3). Type catalog: Böhlke 1984:53 [ref. 13621], Oyakawa 1996:489 [ref. 23140]. •Valid as Oligosarcus robustus Menezes 1969 -- (Menezes & Géry 1983:589 [ref. 8307], Menezes 1987:30 [ref. 20060], Malabarba 1989:137 [ref. 14217], Menezes in Reis et al. 2003:152 [ref. 27061], Ribeiro et al. 2007:52 [ref. 29321], Ribeiro & Menezes 2015:78 [ref. 33768], Menezes & Ribeiro 2015:545 [ref. 33973], Bertaco et al. 2016:414 [ref. 34561], Petry et al. 2016:302 [ref. 34966], Wendt et al. 2019:5 [ref. 36952], Koerber et al. 2021:3 [ref. 38894], Giora & Wingert 2023:76 [ref. 41026], Koerber et al. 2023:3 [ref. 40355], Loureiro et al. 2023:70 [ref. 40506], Menezes & Camelier 2024:245 [ref. 40817]). Current status: Valid as Oligosarcus robustus Menezes 1969. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: coastal drainages of Rio Grande do Sul State (Brazil and Uruguay). Habitat: freshwater.

schindleri, Oligosarcus Menezes [N. A.] & Géry [J.] 1983:566, Fig. 2 [Revue Suisse de Zoologie v. 90 (no. 3); ref. 8307] Small tributary of Río Chapare at San Francisco de Chipiriri, about 100 kilometers east of Cochabamba, [tentatively 16°45'00"S, 65°18'30"W], Bolivia. Holotype: ZSM 26095. Paratypes: MHNG 2098.10-11 (2), MZUSP 25719-20 (1, 1), USNM 228088 (1), ZSM 26094 (1). Type catalog: Oyakawa 1996:489 [ref. 23140], Neumann 2011:246 [ref. 31652]. •Valid as Oligosarcus schindleri Menezes & Géry 1983 -- (Menezes 1987:26 [ref. 20060], Menezes in Reis et al. 2003:152 [ref. 27061], Ribeiro et al. 2007:52 [ref. 29321], Sarmiento et al. 2014:185 [ref. 35004], Ribeiro & Menezes 2015:79 [ref. 33768], Menezes & Camelier 2024:245 [ref. 40817]). Current status: Valid as Oligosarcus schindleri Menezes & Géry 1983. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Chapare River basin and lagoons near Cochabamba, Bolivia. Habitat: freshwater.

solitarius, Oligosarcus Menezes [N. A.] 1990:6, Fig. 1 [Boletim de Zoologia, Universidad de São Paulo v. II [for 1987]; ref. 20060] Lagoa Carioca, Vale do Rio Doce, Minas Gerais State, about 20°S, 43°W, Brazil. Holotype: MZUSP 37377. Paratypes: MZUSP 28952 (43), 28973 (38), 28982 (39), 36638 (11), 37401 (7); USNM 289216 (5). Type catalog: Oyakawa 1996:489-490 [ref. 23140]. •Valid as Oligosarcus solitarius Menezes 1990 -- (Menezes in Reis et al. 2003:152 [ref. 27061], Ribeiro et al. 2007:52 [ref. 29321], Ribeiro & Menezes 2015:79 [ref. 33768] dated as 1991, Wendt et al. 2019:5 [ref. 36952], Menezes & Camelier 2024:245 [ref. 40817] dated 1987, Vieira-Guimarães et al. 2024:39 [ref. 41258]). Current status: Valid as Oligosarcus solitarius Menezes 1990. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Doce River basin, Minas Gerais (Brazil). Habitat: freshwater.

varii, Oligosarcus Menezes [N. A.] & Ribeiro [A. C.] 2015:541, Figs. 1-4 [Neotropical Ichthyology v. 13 (no. 3); ref. 33973] Rio Grande do Sul, São Marcos, rio Jacuí basin, rio São Marcos near to hydroeletric plant PCH rio São Marcos, Brazil, 29°02’13"S, 51°05’39"W. Holotype: MCP 31148. Paratypes: MCP, MZUSP. •Valid as Oligosarcus varii Menezes & Ribeiro 2015 -- (Bertaco et al. 2016:414 [ref. 34561] as vari, Wendt et al. 2019:5 [ref. 36952], Menezes & Camelier 2024:245 [ref. 40817]). Current status: Valid as Oligosarcus varii Menezes & Ribeiro 2015. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Rio Jacuí basin, Laguna dos Patos system, Brazil. Habitat: freshwater.