jalapensis, Rivulus Costa [W. J. E. M.] 2010:194, Figs. 1-2 [Ichthyological Exploration of Freshwaters v. 21 (no. 3); ref. 31043] Stream tributary to Novo River, itself a tributary of the Sono River, Tocantins River drainage, Amazon River basin, 10°18'26"S, 46°57'07"W, Parque Estadual do Jalapão, Estado do Tocantins, Brazil, elevation 382 meters. Holotype: UFRJ 6713. Paratypes: UFRJ 6714 (9), 6715 (2 males, 2 females c&s) •Valid as Melanorivulus jalapensis (Costa 2010) -- (Costa 2011:241 [ref. 31655], Costa 2012:58 [ref. 32069], Costa et al. 2015:32 [ref. 33784], Nielsen & Pinto 2015:137 [ref. 33903], Costa et al. 2016:270 [ref. 35405], Costa 2017:64 [ref. 35046]). Current status: Valid as Melanorivulus jalapensis (Costa 2010). Rivulidae: Rivulinae. Distribution: Sono River drainage, Tocantins River basin, central Brazil. Habitat: freshwater.