caudomarginatus, Rivulus Seegers [L.] 1984:307, Figs. 10-11 [Zoologische Beiträge v. 28 (no. 2); ref. 17455] Greta [Grota] Funda near a technical center of the army, southeast of Rio de Janeiro, Brazil. Holotype: ZFMK 12848. Paratypes: BMNH 1983.6.9:16-19 (4); MZUSP uncat. (4?); RMNH 29219-20 (2, 2); SMF 17864 (4); ZFMK 12849 (1),12855-59 (5); ZMA 119096 (4); ZMB 31349 (4). Type catalog: Busse 1984:220 [ref. 28342], Paepke & Seegers 1986:169 [ref. 19981], Herder et al. 2010:125 [ref. 31087]. •Valid as Rivulus caudomarginatus Seegers 1984 -- (Huber 1992:143 [ref. 20639], Lazara 2001:272 [ref. 25711], Costa in Reis et al. 2003:535 [ref. 27061]). •Valid as Cryptolebias caudomarginatus (Seegers 1984) -- (Costa 2004:115 [ref. 27763]). •Synonym of Kryptolebias ocellatus (Hensel 1868) -- (Costa 2016:187 [ref. 34932]). •Valid as Kryptolebias caudomarginatus (Seegers 1984) -- (Costa 2004:107 [ref. 28584], Vermeulen & Hrbek 2005:7 [ref. 28142], Costa 2006:9 [ref. 28624], Costa 2011:186 [ref. 31358], Huber 2017:11 [ref. 35719], Carvalho-Filho 2023:94 [ref. 40480]). Current status: Valid as Kryptolebias caudomarginatus (Seegers 1984). Rivulidae: Kryptolebiatinae. Distribution: South America: coastal rivers and lagoons (Rio de Janeiro, Brazil). Habitat: freshwater.