haraldsiolii, Rivulus Berkenkamp [H. O.] 1984:430, Figs. 1-3 [Amazoniana v. 8 (no. 4); ref. 8249] Lower rio Itapocú, Estado de Santa Catarina, southeastern Brazil, 27°16'30"S, 48°43'00"W. Holotype: ZMH 6530. Paratypes: ZMH 6531 (3). Type catalog: Huber 1992 [ref. 20639], Wilkens & Dohse 1993:416 [ref. 21161]. •Status uncertain -- (Huber 1992:224 [ref. 20639]). •Valid as Rivulus haraldsiolii Berkenkamp 1984 -- (Costa 1991:582 [ref. 20033], Lazara 2001:275 [ref. 25711], Costa in Reis et al. 2003:536 [ref. 27061], Costa 2004:105 [ref. 27824], Costa 2006:139 [ref. 28875] in subgenus Cynodonichthys, Costa 2007:178 [ref. 29203], Costa 2008:47 [ref. 29622] in subgenus Atlantirivulus, Costa 2008:135 [ref. 29871], Costa 2008:199 [ref. 29962], Costa & Lanés 2009:94 [ref. 30256]). •Valid as Atlantirivulus haraldsiolii (Berkenkamp 1984) -- (Costa 2011:244 [ref. 31655], Costa 2014:19 [ref. 33307], Volcan et al. 2024:98 [ref. 41345] as haraldisiolii). Current status: Valid as Atlantirivulus haraldsiolii (Berkenkamp 1984). Rivulidae: Rivulinae. Distribution: South America: Atlantic coastal plain rivers, southeastern Brazil. Habitat: freshwater.