Papiliolebias hatinne, a new annual fish species (Cyprinodontiformes: Rivulidae) from Salta, Argentina

Abstract

Papilio[ebias Jwtillllt! sp. n. is described from a tcmporary pondo 5 km north of Embarcación, in the río Bermejo basin, Province of Salta, Argentina. Papilio/ebias /wlinne sp. n. is distinguished from the only congener, P bitteri, from ¡hc río Paraguay basin . by a combination of eharactcrs: 26-28 vertcbrae, with 8-10 being precaudal: second proximal radial of anal fin located between vertebrae 9 and lO or 10 and 11: 1-2 vomerine teeth: an elongation of jaw suspensorium: firsl epibranchial somewhat triangular: 7-8 pelvic-fin ruys: 12- 13 pectoralfin rays: 20-23 caudal-fin rays: males with anal fin turquoise bluc. dorsal and caudal fins bluish. pelvic fin blue, and humeral Spol metallie bluish green; remales withoU( dark dots on Aan ks. The chromosome formula is 2n= 28. Ihe FN= 36. imegrated by IWO pairs of metacemric, two pairs of suhmetacentric and len pairs of subte[occnlric chromosomes.