filamentosus, Plesiolebias Costa [W. J. E. M.] & Brasil [G. C.] in Costa 2007:27 [Zootaxa No. 1410; ref. 28993] Sampaio, temporary pool in rio Tocantins floodplains, about 1.5 kilometers from left river bank, 5°16'58"S, 47°53'30"W, Estado do Tocantins, Brazil, elevation 102 meters. Holotype: UFRJ 6367. Paratypes: UFRJ 5135 (13), 6368 (3, c&s), 4089 (11). Second author is G. C. Brasil. •Valid as Plesiolebias filamentosus Costa & Brasil 2007. Current status: Valid as Plesiolebias filamentosus Costa & Brasil 2007. Rivulidae: Rivulinae. Distribution: Temporary pools, middle Tocantins River floodplains, between Itaguatins and Sampaio, Estado do Tocantins, Brazil. Habitat: freshwater.