W. J. E. M. Costa
Rivulus formosensis, a new aplocheiloid killifish from the upper Corrente River drainage, upper Paraná River basin, central Brazil (Cyprinodontiformes: Rivulidae)Abstract
Rivulus formosensis, new species of the subgenus Melanorivulus, is described from the upper Corrente River drainage, a part of the Paranaiba River drainage of the upper Parana River basin, central Brazil. It is considered a member of the R. pictus clade, which is diagnosed by the flank being intense greenish blue, to purplish blue above anal-fin base in males. It is distinguished from other species of Melanorivulus by a unique color pattern consisting of Y-shaped red marks on the flank in males.
Costa, Wilson J. E. M.
Ichthyol. Explor. Freshwaters, Vol. 19, No. 1, pp. 85-90, 2 figs., 1 tab., 2008