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

Species in the genus Nannostomus: [ 31 ] records

amazona, Cyprinodon Eigenmann [C. H.] 1894:627 [Annals of the New York Academy of Sciences v. 7 (art. 5); ref. 1214] Lower Amazonas, Brazil. Syntypes: (18) BMNH 1894.5.18.52 (1), CAS 29351 (5). •Questionably a synonym of Nannostomus trifasciatus Steindachner 1876 or the same as Nannostomus marginatus Eigenmann 1909 -- (Weitzman 1966:27 [ref. 12368], Marinho 2024:389 [ref. 40817]). Current status: Uncertain as Nannostomus trifasciatus Steindachner 1876. Lebiasinidae: Pyrrhulininae. Habitat: freshwater.

anduzei, Nannostomus Fernandez [J. M.] & Weitzman [S. H.] 1987:165, Figs. 1-7 [Proceedings of the Biological Society of Washington v. 100 (no. 1); ref. 5981] Laguna Provincial, about 20 kilometers north of Puerto Ayacucho, about 5°50'N, 67°30'W, Depto. de Ature, Amazonas, Venezuela. Holotype: MBUCV-V-15141. Paratypes: AMNH 57009-10 (15, 4); ANSP 157486 (4); BMNH 1985.12.31.4-8 (4); CAS 57819 (4); MAC-PAY-0389 (10), -1200 (13); MBUCV-V-15600 (16, 14 c&s), V-15601 (12); MZUSP 35433 (4); UMMZ 213449 (4); USNM 277695 (6, c&s), 277696-97 (43, 102). Type catalog: Vari & Howe 1991:31 [ref. 19022], Oyakawa 1996:483 [ref. 23140], Provenzano et al. 1998:13 [ref. 24196]. •Valid as Nannostomus anduzei Fernandez & Weitzman 1987 -- (Géry & Römer 1997:70 [ref. 23712], Weitzman & Weitzman in Reis et al. 2003:243 [ref. 27061], Marinho 2024:385 [ref. 40817]). Current status: Valid as Nannostomus anduzei Fernandez & Weitzman 1987. Lebiasinidae: Pyrrhulininae. Distribution: South America: upper Orinoco and Negro River drainages, Brazil and Venezuela. Habitat: freshwater.

anomalus, Nannostomus Steindachner [F.] 1876:129 [81] [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 74 (1. Abth.); ref. 4225] Rio Negro mouth; Amazon River at Obidos, Brazil. Syntypes: (several) not found at NMW. On p. 81 of separate. •Synonym of Nannostomus beckfordi Günther 1872 -- (Weitzman 1966:12 [ref. 12368], Weitzman & Weitzman in Reis et al. 2003:244 [ref. 27061], Zarske 2011:292 [ref. 31670], Marinho 2024:385 [ref. 40817]). Current status: Synonym of Nannostomus beckfordi Günther 1872. Lebiasinidae: Pyrrhulininae. Habitat: freshwater.

aripirangensis, Nannostomus Meinken [H.] 1931:553, Fig. [Wochenschrift für Aquarien- und Terrarienkunde v. 28 (no. 34); ref. 16307] Aripiranga Island, northeast of Belé, do Pará, Pará, Brazil. Neotype: ZMB 33973. Syntypes: destroyed during WWII. Also published as a separate without pagination. Neotype selected by Zarske 2011:287 [ref. 31670]. •Synonym of Nannostomus beckfordi Günther 1872 -- (Weitzman 1966:13 [ref. 12368], Weitzman & Weitzman in Reis et al. 2003:244 [ref. 27061], Zarske 2011:287 [ref. 31670], Marinho 2024:385 [ref. 40817]). Current status: Synonym of Nannostomus beckfordi Günther 1872. Lebiasinidae: Pyrrhulininae. Habitat: freshwater.

auratus, Poecilobrycon Eigenmann [C. H.] 1909:43 [Annals of the Carnegie Museum v. 6 (no. 1); ref. 1222] Konawaruk, Guyana. Holotype: FMNH 52768 [ex CM 1161]. Paratypes: (27, CM and IU) BMNH 1911.10.31.381-382 (2); CAS 62313-15 [ex IU 11688-90] (4, 3, 5); FMNH 7339 (1), 52769-70 (1, 2), 53549 (4); MCZ 29944 (1). Type catalog: Henn 1928:56 [ref. 12305], Ibarra & Stewart 1987:68 [ref. 12367]. •Synonym of Poecilobrycon eques (Steindachner 1876) -- (Weitzman 1966:47 [ref. 12368]). •Synonym of Nannostomus eques Steindachner 1876 -- (Weitzman & Weitzman in Reis et al. 2003:244 [ref. 27061], Marinho 2024:386 [ref. 40817]). Current status: Synonym of Nannostomus eques Steindachner 1876. Lebiasinidae: Pyrrhulininae. Habitat: freshwater.

beckfordi, Nannostomus Günther [A.] 1872:146 [Proceedings of the Zoological Society of London 1872 (pt 1) (art. 5) (for 6 Feb. 1872); ref. 2000] Coast of Demerara, Guyana. Holotype (unique): BMNH 1871.12.28.10. •Valid as Nannostomus beckfordi Günther 1872 -- (Weitzman 1966:12 [ref. 12368], Weitzman & Cobb 1975:14 [ref. 7134], Planquette et al. 1996:174 [ref. 22818], Keith et al. 2000:14 [ref. 24547], Géry & Zarske 2002:36 [ref. 26555], Weitzman & Weitzman in Reis et al. 2003:244 [ref. 27061], Zarske 2009:11 [ref. 30197], Zarske 2011:287 [ref. 31670], Melo et al. 2016:133 [ref. 34701], Guimarães et al. 2020:1 [ref. 37521], Silva et al. 2020:8 [ref. 37809], Koerber et al. 2022:27 [ref. 39235], Taphorn et al. 2022:26 [ref. 41297], Vieira et al. 2023:18 [ref. 40759], Marinho 2024:385 [ref. 40817]). Current status: Valid as Nannostomus beckfordi Günther 1872. Lebiasinidae: Pyrrhulininae. Distribution: South America: rivers of Guiana south to Amazon River basin and Amazon River up to Negro River (Brazil, French Guiana, Guyana and Suriname); coastal watersheds of Maranhão (Brazil); introduced elsewhere in Brazil. Habitat: freshwater.

bifasciatus, Nannostomus Hoedeman [J. J.] 1954:85, Fig. [Beaufortia v. 4 (no. 39); ref. 12647] Berg en Dal at Suriname River, Suriname. Holotype: ZMA 100513 (apparently lost). Paratypes: ZMA 100513 (3, with holotype). Type catalog: Nijssen et al. 1982:23 [ref. 19236]. •Valid as Nannostomus bifasciatus Hoedeman 1954 -- (Weitzman 1966:19 [ref. 12368], Weitzman & Cobb 1975:16 [ref. 7134], Planquette et al. 1996:176 [ref. 22818], Weitzman & Weitzman in Reis et al. 2003:244 [ref. 27061], Zarske 2011:292 [ref. 31670], Melo et al. 2016:133 [ref. 34701], Borstein et al. 2022:16 [ref. 39507], Marinho 2024:386 [ref. 40817]). Current status: Valid as Nannostomus bifasciatus Hoedeman 1954. Lebiasinidae: Pyrrhulininae. Distribution: South America: coastal rivers (Suriname, French Guiana and Brazil). Habitat: freshwater.

britskii, Nannostomus Weitzman [S. H.] 1978:5, Figs. 3-4 [Smithsonian Contributions to Zoology No. 263; ref. 7040] Igarapé of Lago José-Açú, Parantins, Amazon River, Amazonas, Brazil. Holotype: MZUSP 7795. Paratypes: MZUSP 13072 (1), USNM 216203 (1). Type catalog: Vari & Howe 1991:31 [ref. 19022], Oyakawa 1996:483 [ref. 23140]. •Valid as Nannostomus britskii Weitzman 1978 -- (Weitzman & Weitzman in Reis et al. 2003:244 [ref. 27061], Marinho 2024:386 [ref. 40817]). Current status: Valid as Nannostomus britskii Weitzman 1978. Lebiasinidae: Pyrrhulininae. Distribution: South America: Amazon River drainage, Parantins, Amazonas State, Brazil. Habitat: freshwater.

cumuni, Nannostomous Arnold [J. P.] 1950:72 [Taschenkalender für Aquarien-und Terrarienfreunde v. 34 (1950); ref. 22892] British Guyana. No types known. Not available, described in synonymy of Nannostomus harrisoni (Eigenmann 1909). •Questionably a synonym of Poecilobrycon harrisoni Eigenmann 1909 -- (Weitzman 1966:38 [ref. 12368]). •Questionably a synonym of Nannostomus harrisoni (Eigenmann 1909) -- (Marinho 2024:387 [ref. 40817]). Current status: Uncertain as Nannostomus harrisoni (Eigenmann 1909). Lebiasinidae: Pyrrhulininae.

digrammus, Poecilobrycon Fowler [H. W.] 1913:525, Fig. 5 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 65; ref. 1389] Rio Madeira about 200 miles east of 62°20'W, Brazil. Holotype: ANSP 39189. Paratypes: ANSP 39190-91 (2), CAS-SU [ex ANSP 39192] (1, missing), USNM 92954 (1). Type catalog: Böhlke 1984:118 [ref. 13621]. •Valid as Nannostomus digrammus (Fowler 1913) -- (Weitzman 1966:22 [ref. 12368], Weitzman & Cobb 1975:9 [ref. 7134], Ortega & Vari 1986:10 [ref. 9708], Weitzman & Weitzman in Reis et al. 2003:244 [ref. 27061], Zarske 2011:296 [ref. 31670], Sarmiento et al. 2014:81, 186 [ref. 35004], DoNascimiento et al. 2017:44 [ref. 35633], Careaga et al. 2020:76 [ref. 37774], Meza-Vargas et al. 2021:15 [ref. 39298], Taphorn et al. 2022:26 [ref. 41297], Marinho 2024:386 [ref. 40817], Yunoki et al. 2025:332 [ref. 42013]). Current status: Valid as Nannostomus digrammus (Fowler 1913). Lebiasinidae: Pyrrhulininae. Distribution: South America: Amazon River basin (Bolivia, Brazil, Colombia, Guyana and Peru). Habitat: freshwater.

eques, Nannostomus Steindachner [F.] 1876:126 [78], Pl. 9 (fig. 3) [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 74 (1. Abth.); ref. 4225] Peruvian Amazon; Tabatinga, Amazon, Brazil. Syntypes: (several) NMW 56513 (5). On p. 78 of separate. •Valid as Poecilobrycon eques (Steindachner 1876) -- (Weitzman 1966:47 [ref. 12368]). •Valid as Nannostomus eques Steindachner 1876 -- (Ortega & Vari 1986:10 [ref. 9708], Weitzman & Cobb 1975:33 [ref. 7134], Weitzman & Weitzman in Reis et al. 2003:244 [ref. 27061], Barriga Salazar 2014:110 [ref. 35745], DoNascimiento et al. 2017:45 [ref. 35633], Meza-Vargas et al. 2021:15 [ref. 39298], Chuctaya et al. 2022:29 [ref. 42137], Taphorn et al. 2022:26 [ref. 41297], Marinho 2024:386 [ref. 40817]). Current status: Valid as Nannostomus eques Steindachner 1876. Lebiasinidae: Pyrrhulininae. Distribution: South America: Amazon and Orinoco river basins (Brazil, Ecuador, Colombia Guyana, and Peru). IUCN (2023): Least Concern. Habitat: freshwater.

erythrurus, Poecilobrycon Eigenmann [C. H.] 1909:44 [Annals of the Carnegie Museum v. 6 (no. 1); ref. 1222] Rockstone sand-bank, Guyana. Holotype: FMNH 52774 [ex CM 1168]. Paratypes: (14, CM and IU) BMNH 1911.10.31.383 (1); CAS 62316-18 [ex IU 11693-95] (2, 1, 1); FMNH 7340 (1), 52775 (1), 52787-88 (1, 1), 52974 (2); MCZ 29936 (1); CAS-SU 21918 (1). Type catalog: Henn 1928:56 [ref. 12305], Böhlke 1953:26 [ref. 12291], Ibarra & Stewart 1987:68 [ref. 12367]. Also as a synonym of Nannostomus trifasciatus in Marinho 2024:388 [ref. 40817]. •Synonym of Nannostomus trifasciatus Steindachner 1876 -- (Weitzman 1966:27 [ref. 12368], Paepke & Arendt 2001:152 [ref. 26010], Weitzman & Weitzman in Reis et al. 2003:246 [ref. 27061]). •Valid as Nannostomus erythrurus (Eigenmann 1909) -- (Zarske 2013:125 [ref. 32773], Taphorn et al. 2022:26 [ref. 41297], Marinho 2024:386 [ref. 40817]). Current status: Valid as Nannostomus erythrurus (Eigenmann 1909). Lebiasinidae: Pyrrhulininae. Distribution: South America: Guyana. Habitat: freshwater.

espei, Poecilobrycon Meinken [H.] 1956:31, Fig. [Die Aquarien- und Terrarienzeitschrift (DATZ) v. 9 (no. 2); ref. 12211] South America [possibly Kamarang River drainage, Mazaruni River basin, Guyana]. Lectotype: CAS-SU 51593. Paralectotypes: CAS-SU 51592 (2); ZMH H1188 (2). Type catalog: Wilkens 1977:156 [ref. 22013]. Lectotype selected by Weitzman 1966:11 [ref. 12368]. •Valid as Nannostomus espei (Meinken 1956) -- (Weitzman 1966:9 [ref. 12368], Weitzman & Cobb 1975:7 [ref. 7134], Géry & Zarske 2002:36 [ref. 26555], Weitzman & Weitzman in Reis et al. 2003:244 [ref. 27061], DoNascimiento et al. 2017:[6] [ref. 35679], Taphorn et al. 2022:26 [ref. 41297], Marinho 2024:386 [ref. 40817]). Current status: Valid as Nannostomus espei (Meinken 1956). Lebiasinidae: Pyrrhulininae. Distribution: South America: Mazaruni River basin (Guyana) endemic. Habitat: freshwater.

grandis, Nannostomus Zarske [A.] 2011:285, Figs. 1-3, 10-14 [Vertebrate Zoology v. 61 (no. 3); ref. 31670] Belem, Para, Brazil [aquarium import]. Holotype: MTD F 32459. Paratypes: MTD F 32460-32461 (2). •Valid as Nannostomus grandis Zarske 2011 -- (Marinho 2024:387 [ref. 40817]). Current status: Valid as Nannostomus grandis Zarske 2011. Lebiasinidae: Pyrrhulininae. Distribution: South America: ?, Brazil. Habitat: freshwater.

harrisoni, Poecilobrycon Eigenmann [C. H.] 1909:43 [Annals of the Carnegie Museum v. 6 (no. 1); ref. 1222] Canal at Christianburg, Guyana. Holotype: FMNH 52767 [ex CM 1160]. Paratypes: CAS 62376 [ex IU 11709] (2). Type catalog: Henn 1928:56 [ref. 12305], Ibarra & Stewart 1987:68 [ref. 12367]. •Valid as Poecilobrycon harrisoni Eigenmann 1909 -- (Weitzman 1966:12 [ref. 12368]). •Valid as Nannostomus harrisoni (Eigenmann 1909) -- (Weitzman & Cobb 1975:11 [ref. 7134], Weitzman & Weitzman in Reis et al. 2003:244 [ref. 27061], Zarske 2011:293 [ref. 31670], DoNascimiento et al. 2017:45 [ref. 35633], Taphorn et al. 2022:26 [ref. 41297], Marinho 2024:387 [ref. 40817]). Current status: Valid as Nannostomus harrisoni (Eigenmann 1909). Lebiasinidae: Pyrrhulininae. Distribution: South America: Demerara and Orinoco River basins (Guyana, Venezuela and Colombia). Habitat: freshwater.

limatus, Nannostomus Weitzman [S. H.] 1978:9, Figs. 6-8 [Smithsonian Contributions to Zoology No. 263; ref. 7040] Tributary to Lago Mapará, near Santarém, Pará, Brazil. Holotype: MZUSP 8486. Paratypes: ANSP 137389 (2); BMNH 1976.11.8.6-7 (2); MZUSP 8203 (1), 9192 (1), 12939-12945 (7), 12951-12963 (14); USNM 216200-01 (1, 7), 216202 (6, not 5). Type catalog: Böhlke 1984:119 [ref. 13621], Vari & Howe 1991:31 [ref. 19022], Oyakawa 1996:483-484 [ref. 23140]. •Valid as Nannostomus limatus Weitzman 1978 -- (Weitzman & Weitzman in Reis et al. 2003:245 [ref. 27061], Zarske 2011:293 [ref. 31670], Marinho 2024:387 [ref. 40817]). Current status: Valid as Nannostomus limatus Weitzman 1978. Lebiasinidae: Pyrrhulininae. Distribution: South America: Amazon River basin near Santarém, Brazil. Habitat: freshwater.

marginatus, Nannostomus Eigenmann [C. H.] 1909:41 [Annals of the Carnegie Museum v. 6 (no. 1); ref. 1222] Maduni Creek, Guyana. Holotype: FMNH 53550 [ex CM 1171]. Paratypes: (45, CM and IU) BMNH 1911.10.31.167-168 (2), 1912.1.31.5 (1); CAS 62108-14 [ex IU 11696-702] (4, 2, 1, 1, 2, 1, 5); FMNH 7562 (1), 52776-80 (4, 2, 2, 0, 6), 52790 (1), 53551 (1); MCZ 29933 (1), 29937 (1); CAS-SU 21941 (1); USNM 66252 (1), 165450 (1); ZMA 100991 (1). Type catalog: Henn 1928:56 [ref. 12305], Böhlke 1953:25 [ref. 12291], Nijssen et al. 1982:23 [ref. 19236], Ibarra & Stewart 1987:59 [ref. 12367], Vari & Howe 1991:31 [ref. 19022]. •Valid as Nannostomus marginatus Eigenmann 1909 -- (Weitzman 1966:32 [ref. 12368], Weitzman & Cobb 1975:25 [ref. 7134], Paepke & Arendt 2001:147 [ref. 26010], Weitzman & Weitzman in Reis et al. 2003:245 [ref. 27061], Zarske 2009:11 [ref. 30197], Zarske 2011:296 [ref. 31670], Barriga Salazar 2014:110 [ref. 35745], DoNascimiento et al. 2017:45 [ref. 35633], Meza-Vargas et al. 2021:15 [ref. 39298], Taphorn et al. 2022:27 [ref. 41297], Marinho 2024:387 [ref. 40817]). Current status: Valid as Nannostomus marginatus Eigenmann 1909. Lebiasinidae: Pyrrhulininae. Distribution: South America: Amazon and Orinoco River basins (Brazil, Ecuador, Colombia, Guyana, Peru, Suriname and Venezuela). Habitat: freshwater.

marilynae, Nannostomus Weitzman [S. H.] & Cobb [J. S.] 1975:29, Figs. 28-30 [Smithsonian Contributions to Zoology No. 186; ref. 7134] Rio Negro, Brazil. Holotype: CAS-SU 50238. Paratypes: CAS-SU 50239 (now 23). Non-type material: CAS-SU 50240-41 (1, 3), USNM 209227 (8). •Valid as Nannostomus marilynae Weitzman & Cobb 1975 -- (Weitzman & Weitzman in Reis et al. 2003:245 [ref. 27061], DoNascimiento et al. 2017:45 [ref. 35633], Marinho 2024:387 [ref. 40817]). Current status: Valid as Nannostomus marilynae Weitzman & Cobb 1975. Lebiasinidae: Pyrrhulininae. Distribution: South America: Negro and Vichada River basins, Brazil and Colombia. Habitat: freshwater.

minimus, Nannostomus Eigenmann [C. H.] 1909:42 [Annals of the Carnegie Museum v. 6 (no. 1); ref. 1222] Erukin, Guyana. Holotype: FMNH 52771 [ex CM 1165]. Paratypes: (3, CM and IU) BMNH 1911.10.31.166 (1), CAS 29350 [ex IU 11691] (1), FMNH 52772 (1). Type catalog: Henn 1928:56 [ref. 12305], Ibarra & Stewart 1987:59 [ref. 12367]. •Synonym of Nannostomus beckfordi Günther 1872 -- (Weitzman 1966:13 [ref. 12368]). •Valid as Nannostomus minimus Eigenmann 1909 -- (Weitzman & Cobb 1975:21 [ref. 7134], Géry & Zarske 2002:36 [ref. 26555], Weitzman & Weitzman in Reis et al. 2003:245 [ref. 27061], Taphorn et al. 2022:27 [ref. 41297], Marinho 2024:387 [ref. 40817]). Current status: Valid as Nannostomus minimus Eigenmann 1909. Lebiasinidae: Pyrrhulininae. Distribution: South America: Potaro and Mazaruni River basins (Guyana) endemic. Habitat: freshwater.

minutus, Archicheir Eigenmann [C. H.] 1909:46 [Annals of the Carnegie Museum v. 6 (no. 1); ref. 1222] Canal at Christianburg, Guyana. Holotype (unique): FMNH 52786 [ex CM 1186]. Type catalog: Henn 1928:55 [ref. 12305], Ibarra & Stewart 1987:11 [ref. 12367]. •Synonym of Poecilobrycon harrisoni Eigenmann 1909 -- (Weitzman 1966:38 [ref. 12368]). •Synonym of Nannostomus harrisoni (Eigenmann 1909) -- (Weitzman & Weitzman in Reis et al. 2003:244 [ref. 27061], Marinho 2024:387 [ref. 40817]). Current status: Synonym of Nannostomus harrisoni (Eigenmann 1909). Lebiasinidae: Pyrrhulininae. Habitat: freshwater.

mortenthaleri, Nannostomus marginatus Paepke [H.-J.] & Arendt [K.] 2001:144, Figs. 1-6, 10-13, 15 [Verhandlungen der Gesellschaft für Ichthyologie 2001; ref. 26010] Small tributary of Rio Nanay at the village of Alvarenga, Loreto, Province of Maynas (=Iquitos), 3°31'10"S, 74°25'40"W, Peru. Holotype: MUSM 17719. Paratypes: MUSM 17720 (3); MTD F 24773 (3); ZMB 33228 (4), 33229 (6, stained and partially damaged). Type catalog: Zarske 2003:19 [ref. 27474]. •Synonym of Nannostomus marginatus Eigenmann 1909, but a valid subspecies as described -- (Paepke & Arendt 2001:143 [ref. 26010]). •Valid as Nannostomus mortenthaleri Paepke & Arendt 2001 -- (Weitzman & Weitzman in Reis et al. 2003:245 [ref. 27061], Zarske 2009:11 [ref. 30197], Meza-Vargas et al. 2021:15 [ref. 39298], Marinho 2024:388 [ref. 40817]). Current status: Valid as Nannostomus mortenthaleri Paepke & Arendt 2001. Lebiasinidae: Pyrrhulininae. Distribution: South America: Nanay River drainage, Loreto, Peru. Habitat: freshwater.

nigrotaeniatus, Nannostomus Zarske [A.] 2013:127, Figs. 1, 10-13 [Vertebrate Zoology v. 63 (no. 2); ref. 32773] Río Ventuari, Venezuela (aquarium import). Holotype: MTD F 32993. Paratypes: MTD F 32994-32998 (5), 32999-33002 (5). •Valid as Nannostomus nigrotaeniatus Zarske 2013 -- (Marinho 2024:388 [ref. 40817]). Current status: Valid as Nannostomus nigrotaeniatus Zarske 2013. Lebiasinidae: Pyrrhulininae. Distribution: South America: Río Ventuari drainage, Venezuela. Habitat: freshwater.

nitidus, Nannostomus Weitzman [S. H.] 1978:3, Figs. 1-2 [Smithsonian Contributions to Zoology No. 263; ref. 7040] Igarapé Candiru-Mirim, Rio Capim, Pará, Brazil. Holotype: MZUSP 12920. Paratypes: ANSP 137388 (4, published as 5), BMNH 1976.11.8.1-5 (5), MZUSP 12921-38 (18), USNM 216204 (8). Type catalog: Böhlke 1984:119 [ref. 13621], Vari & Howe 1991:31 [ref. 19022], Oyakawa 1996:484 [ref. 23140]. •Valid as Nannostomus nitidus Weitzman 1978 -- (Weitzman & Weitzman in Reis et al. 2003:245 [ref. 27061], Zarske 2011:293 [ref. 31670], Guimarães et al. 2020:1 [ref. 37521], Koerber et al. 2022:27 [ref. 39235] unconfirmed, Marinho 2024:388 [ref. 40817]). Current status: Valid as Nannostomus nitidus Weitzman 1978. Lebiasinidae: Pyrrhulininae. Distribution: South America: lower Amazon and Capim River basins, Pará State, Brazil. Habitat: freshwater.

ocellatus, Poecilobrycon Eigenmann [C. H.] 1909:45 [Annals of the Carnegie Museum v. 6 (no. 1); ref. 1222] Wismar, Guyana. Holotype: FMNH 52975 [ex CM 1179]. Paratypes: (111, CM and IU) BMNH 1911.10.31.384-385 (2); CAS 62377-82 [ex IU 11703-08] (2, 10, 3, 3, 1, 5); FMNH 52781-85 (10, 3, 3, 1, 5), 53552 (1); MCZ 29931 (2); ZMA 100519 (1). Type catalog: Henn 1928:57 [ref. 12305], Nijssen et al. 1982:23 [ref. 19236], Ibarra & Stewart 1987:68 [ref. 12367]. •Synonym of Poecilobrycon unifasciatus (Steindachner 1876) -- (Weitzman 1966:42 [ref. 12368]). •Synonym of Nannostomus unifasciatus Steindachner 1876 -- (Weitzman & Weitzman in Reis et al. 2003:246 [ref. 27061], Marinho 2024:389 [ref. 40817]). Current status: Synonym of Nannostomus unifasciatus Steindachner 1876. Lebiasinidae: Pyrrhulininae. Habitat: freshwater.

picturatus, Nannostomus marginatus Hoedeman [J. J.] 1954:87 [Beaufortia v. 4 (no. 39); ref. 12647] Ditch near Zanderij II, Suriname. Holotype: ZMA 100324a. Paratypes: ZMA 100324b (4), 100515 (22). Type catalog: Nijssen et al. 1982:23 [ref. 19236]. •Synonym of Nannostomus marginatus Eigenmann 1909 -- (Weitzman 1966:32 [ref. 12368], Weitzman & Weitzman in Reis et al. 2003:245 [ref. 27061], Marinho 2024:387 [ref. 40817]). •Synonym of Nannostomus marginatus Eigenmann 1909, but a valid subspecies -- (Paepke & Arendt 2001:152 [ref. 26010]). Current status: Synonym of Nannostomus marginatus Eigenmann 1909. Lebiasinidae: Pyrrhulininae. Habitat: freshwater.

rubrocaudatus, Nannostomus Zarske [A.] 2009:12, Figs. 1-6, 12a-b [Vertebrate Zoology v. 59 (no. 1); ref. 30197] Peru [aquarium import]. Holotype: MTD F 31562. Paratypes: MTD F 31563-64 (2), 31565-70 (6). •Valid as Nannostomus rubrocaudatus Zarske 2009 -- (Marinho 2024:388 [ref. 40817]). Current status: Valid as Nannostomus rubrocaudatus Zarske 2009. Lebiasinidae: Pyrrhulininae. Distribution: South America: Marañón River drainage, Loreto, Peru. Habitat: freshwater.

simplex, Nannostomus Eigenmann [C. H.] 1909:42 [Annals of the Carnegie Museum v. 6 (no. 1); ref. 1222] Lama Stop-off, Guyana. Holotype: FMNH 52773 [ex CM 1167]. Paratypes: CAS 62115 [ex IU 11692] (1). Type catalog: Henn 1928:56 [ref. 12305], Ibarra & Stewart 1987:59 [ref. 12367]. •Synonym of Nannostomus beckfordi Günther 1872 -- (Weitzman 1966:13 [ref. 12368], Weitzman & Weitzman in Reis et al. 2003:244 [ref. 27061], Marinho 2024:385 [ref. 40817]). Current status: Synonym of Nannostomus beckfordi Günther 1872. Lebiasinidae: Pyrrhulininae. Habitat: freshwater.

surinami, Nannostomus beckfordi Hoedeman [J. J.] 1954:84 [Beaufortia v. 4 (no. 39); ref. 12647] Berg en Dal at Suriname River, Suriname. Holotype: ZMA 100514a. Paratypes: ZMA 100514b (220). Type catalog: Nijssen et al. 1982:22-23 [ref. 19236]. •Synonym of Nannostomus beckfordi Günther 1872 -- (Weitzman 1966:13 [ref. 12368], Weitzman & Weitzman in Reis et al. 2003:244 [ref. 27061], Marinho 2024:385 [ref. 40817]). Current status: Synonym of Nannostomus beckfordi Günther 1872. Lebiasinidae: Pyrrhulininae. Habitat: freshwater.

trifasciatus, Nannostomus Steindachner [F.] 1876:123 [75], Pl. 9 (fig. 2) [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 74 (1. Abth.); ref. 4225] Amazon River near mouth of Rio Negro and Tabatinga, Brazil. Syntypes: NMW 56522-23 (3, 5). On p. 75 of separate. •Valid as Nannostomus trifasciatus Steindachner 1876 -- (Weitzman 1966:27 [ref. 12368], Weitzman & Cobb 1975:27 [ref. 7134], Ortega & Vari 1986:10 [ref. 9708], Paepke & Arendt 2001:152 [ref. 26010], Weitzman & Weitzman in Reis et al. 2003:246 [ref. 27061], Zarske 2013:127 [ref. 32773], Sarmiento et al. 2014:81, 186 [ref. 35004], DoNascimiento et al. 2017:45 [ref. 35633], Careaga et al. 2020:76 [ref. 37774], Meza-Vargas et al. 2021:15 [ref. 39298], Chuctaya et al. 2022:29 [ref. 42137], Taphorn et al. 2022:27 [ref. 41297], Marinho 2024:388 [ref. 40817], Yunoki et al. 2025:332 [ref. 42013]). Current status: Valid as Nannostomus trifasciatus Steindachner 1876. Lebiasinidae: Pyrrhulininae. Distribution: South America: Amazon, Orinoco and Essequibo River basins (Bolivia, Brazil, Colombia, Guyana and Peru). IUCN (2023): Least Concern. Habitat: freshwater.

unifasciatus, Nannostomus Steindachner [F.] 1876:127 [79], Pl. 9 (fig. 1) [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 74 (1. Abth.); ref. 4225] Near mouth of Rio Negro, Brazil. Syntypes: (several) NMW 56514 (4), 58741 (3). On p. 79 of separate. •Valid as Poecilobrycon unifasciatus (Steindachner 1876) -- (Weitzman 1966:42 [ref. 12368]). •Valid as Nannostomus unifasciatus Steindachner 1876 -- (Weitzman & Cobb 1975:33 [ref. 7134], Weitzman & Weitzman in Reis et al. 2003:246 [ref. 27061], Sarmiento et al. 2014:81, 186 [ref. 35004], DoNascimiento et al. 2017:45 [ref. 35633], Careaga et al. 2020:76 [ref. 37774], Guimarães et al. 2020:1 [ref. 37521], Meza-Vargas et al. 2021:15 [ref. 39298], Koerber et al. 2022:27 [ref. 39235] unconfirmed, Taphorn et al. 2022:27 [ref. 41297], Marinho 2024:388 [ref. 40817], Yunoki et al. 2025:333 [ref. 42013]). Current status: Valid as Nannostomus unifasciatus Steindachner 1876. Lebiasinidae: Pyrrhulininae. Distribution: South America: western Amazon River basin (Bolivia, Brazil, Colombia and Peru); upper Orinoco basin (Venezuela); and Guyana Plateau (Brazil, Guyana and Venezuela); introduced in Trinidad and Tobago. Habitat: freshwater.

vittatus, Poecilobrycon Ahl [E.] 1934:124 [Zoologischer Anzeiger v. 106 (no. 5/6); ref. 17303] Pará, Brazil. Syntypes: ZMB 20791 (5). Types mentioned: Paepke 1995:91 [ref. 21847]. Mentioned earlier by Ahl 1933:184 [ref. 35902], but with no differential diagnosis. •Synonym of Nannostomus trifasciatus Steindachner 1876 -- (Weitzman 1966:27 [ref. 12368], Paepke & Arendt 2001:152 [ref. 26010], Weitzman & Weitzman in Reis et al. 2003:246 [ref. 27061], Marinho 2024:388 [ref. 40817]). •Possibly valid -- (Zarske 2013:127 [ref. 32773]). Current status: Synonym of Nannostomus trifasciatus Steindachner 1876. Lebiasinidae: Pyrrhulininae. Habitat: freshwater.