Astyanax guaricana (Ostariophysi: Characidae), a new species from the rio Cubatão drainage, Paraná State, Southern Brazil

Carlos A M Oliveira,Carla S Pavanelli,Vinicius Abilhoa

doi:10.1590/s1679-62252013000200007

Carlos A M Oliveira, Carla S Pavanelli + Show 1 more

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https://doi.org/10.1590/s1679-62252013000200007

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Journal: Neotropical Ichthyology	Publication Date: Jun 1, 2013
Citations: 3	License type: cc-by

Affiliation: Universidade Estadual de Maringá

Abstract

In this paper we describe a new species of Astyanax collected in the Atlantic Rainforest, in tributaries to the rio Cubatão, coastal basin of the Paraná State, Brazil. The new species presents a combination of characters that allows its allocation in the A. scabripinnis species complex and differs from congeners by the possession of 18 to 22 branched anal-fin rays; 40 to 43 perforated scales in lateral line; dentary teeth decreasing abruptly in size from the fifth tooth; 15 to 17 circumpeduncular series of scales and two vertical humeral spots

Highlights

Astyanax Baird & Girard, 1854 is the most specious genus of characiform fishes (Garavello & Sampaio, 2010), composed of almost 140 valid species (Eschmeyer & Fricke, 2013), and distributed from Southern United States to Argentina (Lima et al, 2003; Casciotta et al, 2005)
All measurements are expressed as percentages of SL, except those subunits of the head, which are expressed as percentages of head length (HL)
Astyanax guaricana represents the second record of the A. scabripinnis species complex sensu Bertaco & Lucena, 2006 in the rio Cubatão basin

Summary

Introduction

Astyanax Baird & Girard, 1854 is the most specious genus of characiform fishes (Garavello & Sampaio, 2010), composed of almost 140 valid species (Eschmeyer & Fricke, 2013), and distributed from Southern United States to Argentina (Lima et al, 2003; Casciotta et al, 2005). Astyanax is diverse and widespread in the freshwaters of the Atlantic Rainforest, and the taxonomic status of several species is not clear (Menezes et al, 2007). Fish species richness registered in the Atlantic Rainforest streams is high (Abilhoa et al, 2011), as a result of the great number of independent coastal drainages (or groups of basins), and the isolating effect of mountains and seawater among coastal rivers (Menezes et al, 2007). This paper intends to formally describe this new Astyanax species

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Literature Cited