new species:
Austrolebias toba Calviño, 2006

type locality:
Província de Chaco, temporary pools close to Ruta 11, N of Río de Oro (holotype: MLP 9652, paratypes: MLP 9653, MACN 8893, BMNH 2005.10.27.1-5)

published in:
Calviño, P. (2006):
Austrolebias toba (Cyprinodontiformes: Rivulidae), una especie nueva de pez anual de la Argentina.
Revista del Museo Argentino de Ciencias Naturales n.s. 7 (2): 183-190

abstract (from publication):
Austrolebias toba sp. n. is described from temporary ponds of the lower río Bermejo basin, in the proximity of the mouth, from Chaco province, Argentina. This new species, is distinguished from all other species of the genus by the following combination of characters: dorsalfin origin anterior to anal-fin origin; dorsal profile of head straight or slightly concave; male body green bluish with some light small dots arranged on vertical lines on flank; very small dots light blue iridescent scattered on unpaired fins; a longitudinal stripe light blue on upper half of dorsal fin of male; dorsal-fin base longer that anal-fin base; pectoral and pelvic fins green bluish; median and posterior dorsal-fin rays of females longer than remainig ones forming an acute posterior tip; round black spots on anterior and middle portion of flank of female. Additional data of the habitat and behaviour in aquarium are added.