Brachyhypopomus Gauderio

n Brachyhypopomus gauderio

istributio atPisces, Taim Gymnotiformes, Ecological Reserve, Hypopomidae, south Brazil D Giora and Malabarba, 2009: New species record * raphic g eo

G Fabiano Correa , Alexandre Miranda Garcia, Marlise de Azevedo Bemvenuti and João Paes Vieira n o

Rio Grande, RS, Brasil. Universidade Federal de Rio Grande, Instituto de Oceanografia, Laboratório de Ictiologia, Campus Carreiros. Caixa Postal 474. CEP 96201-900. otes [email protected] N * Corresponding author. E-mail:

Abstract: Brachyhypopomus gauderio

The present paper describes a new occurrence of the species Giora and Malabarba, 2009 in the Taim Ecological Reserve, Rio Grande do Sul state, Brazil.

a wetland area (32°32’25” S, 52°32’24” W) adjacent to the BR-471 highway (km-495) in the Taim Ecological Reserve, Gymnotiformes is a Neotropical order of fishes in southern Brazil (Figure 2). They were collected by beach occurring from southern Mexico to northern Argentina (Mago-Leccia 1994). One of six nominal families of this Laboratory of the Rio Grande Federal University (FURG) order is Hypopomidae that is comprised of approximately seine hauls during a field trip conducted by the Ichthyology of25 communicationspecies (Albert 2003;and electrolocation. Sullivan and Hopkins Brachyhypopomus 2009), all of Brazil as ‘Pesquisas Ecológicas de Longa Duração’ - PELD). gauderiowhich produce weakly electric impulses for the purposes for the Brazilian Long-Term Ecological program (known in

was recently described by Giora and Malabarba Specimens were preserved in 10% formalin and later B.(2009) gauderio as a new electric fish belonging to the Hypopomidae identified based primarily on Giora and Malabarba (2009). family (Figure 1). According to Giora and Malabarba (2009) individualsSpecimens collected examined in were the Taim stored Ecological at the Reserve Ichthyology had is characterized by the following aspects: Laboratory in the same university (FURG 3018). These first anterior perforated scale of lateral line above pectoral-fin origin; lateral line irregular, not extending fromtheir generallight brown pattern to yellow, coloration head similar darker to than that the described rest of to caudal filament; branchial aperture small and slightly theby Giora body, and dorsal Malabarba surface (2009), with chocolate-brown such as body color stains varying that anterior to pectoral-fin origin; pectoral fins rounded and are connected forming reticulated drawing contrasting with perpendicular insertion; pectoral-fin rays i–ii + 13– with yellow background. 15; anal-fin relatively long with vi–x + 173–206 rays; anal- Brachyhypopomus gauderio is widely distributed in the fin origin located at sameth line of posterior edge of pectoral central, southern and coastal regions of the Rio Grande fin. B. gauderio, with average total length of On November 05 2003, we collected twelve female specimens of do Sul (RS) state, southern Brazil, especially in lagoons, 94.5±13.5mm and average total weight of 2.03±0.81g, in rivers margins, slow-moving creeks and flood areas

Figure 1. Picture of female Brachyhypopomus gauderio

Giora and Malabarba 2009 collected in a wetland area of the Taim Ecological Reserve, Rio Grande do Sul state, Brazil (Picture by Fabiano Corrêa). Check List | Volume 7 | Issue 1 | 2011 019 Correa et al. | Pisces, Gymnotiformes, Hypopomidae, Brachyhypopomus gauderio Giora and Malabarba, 2009

thewith Taim abundant Ecological floating Reserve vegetation (Garcia (Giora et al. and Malabarba encompassing a varietyet al of habitats such as beaches, dunes, mention2009). However, B. gauderio the latest fish inventory available for beenforests, a crucial grasslands area and,for conservation especially, lakes of local and fauna wetlands from to occur in several freshwater sites of this 2006) ecological did not (Motta Marques . 2002). Since its foundation, it has among the 62 fish species reported increasing anthropogenic impacts in its surroundings, reserve. Therefore,B. gauderio the present, work reports for the first such as water diversion for rice irrigation and fishing. The areatime inthe southern occurrence Brazil. of this This recently Federal described Reserve createdspecies inof occurrence of this recently described species of electric electric fish, in this important conservation fish in the Taim Ecological Reserve highlights the urgent need to reinforce conservation actions aiming to protect 1978 harbors a unique freshwater wetland ecosystem its aquatic habitats and biodiversity.

Figure 2. Brachyhypopomus gauderio B. gauderio. The red dot denotes the current record of B. gauderio inside Southern the bordersBrazil (A) of andthe Taimthe Taim Ecological Ecological Reserve. Reserve (B) showing the location of the wetland area where the specimens of were captured. Blue dots denote the previous known geographic distribution of

Acknowledgments:

We are grateful to Júlia Giora and Luiz Roberto Garcia, A.M., M.A. Bemvenuti, J.P.Vieira, D.M.L.M. Marques, M.D.M. Burns, Malabarba for their assistance in species identification and Marlucy NeotropicalA. Moresco Ichthyology and M.V. Condini. 2006. Checklist comparison and Coelho Claudino for her assistance in creating the location map. dominance patternsElectric of the Fishes fish faunaof the atContinental Taim Wetland, Waters South of America Brazil.. Literature Cited 4(2): 261-268. Mago-Leccia, F. 1994. In Caracas: Fundacion para el Desarrollo de lãs Ciencias Fisicas, Albert,(ed.). J.S. Check and List W. of Crampton. Freshwater 2003. Fishes Family of the South Hypopomidae and Central (Bluntnose America. Matematicas y Naturales. 206 p. Knifefishes); p. 494-497 R.E. Reis, S.O. Kullander and C.J. Ferraris Jr. MottaIn Marques, D.M.L., C. Tucci, D. Calazans, V.L.M.Os sites Callegaro e o programa and A. Brachyhypopomus gauderio, new BrasileiroVillanueva. de 2002. pesquisas O Sistema ecológicas Hidrológico de longa do duraçãoTaim - site. 7; p. 125-144 Porto Alegre: Edipucrs. U. Seeliger, C.V. Cordazzo and F. Barbosa (ed.). Giora, J. and L.R. Malabarba. 2009. Belo Horizonte: species, a new Zootaxa example of underestimated species diversity of MCT-CNPq. electric fishes in the southern SouthBrachyhypopomus America (Gymnotiformes: bullocki, new Hypopomidae). 2093:60-68. Received: September 2010 Sullivan, J.P. and C.D. Hopkins.Proceedings 2009. of the Academy of Natural Last Revised: November 2010 Sciencesspecies ofof Philadelphia electric kinfefish (Gymnotiformes: Hypopomidae), from Accepted: January 2011 northern South America. Published online: January 2011 158: 183-192. Editorial responsibility: Marcelo Loureiro

Check List | Volume 7 | Issue 1 | 2011 020