piriana, Moema Costa [W. J. E. M.] 1989:223, Fig. 1 [Revista Brasileira de Biologia v. 49 (no. 1); ref. 14270] Primaver, Pará, Brazil. Holotype: MZUSP 38517. Paratypes: MNRJ 11389-90 (1, 1); MZUSP 35514 (1, c&s), 35515 (1, c&s), 35516 (1). •Valid as Moema piriana Costa 1989 -- (Costa 1993:624 [ref. 21979], Costa 1998:79 [ref. 23792], Lazara 2001:211 [ref. 25711], Costa in Reis et al. 2003:532 [ref. 27061], Huber 2003:14 [ref. 27251], Costa 2003:167 [ref. 27617], Costa 2003:2 [ref. 27634], Valdesalici et al. 2015:129 [ref. 33902], Valdesalici 2016:66 [ref. 34174]). Current status: Valid as Moema piriana Costa 1989. Rivulidae: Rivulinae. Distribution: Lower Amazon River basin, Brazil. Habitat: freshwater.