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New Records of Freshwater Fish for Uruguay

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New Records of Freshwater Fish for Uruguay ISSN 1809-127X (online edition) © 2010 Check List and Authors Chec List Open Access | Freely available at www.checklist.org.br Journal of species lists and distribution N Matías Zarucki 1, Iván González-Bergonzoni 1,2, Franco Teixeira-de-Mello 1,2, Alejandro Duarte 1, ISTRIBUTIO SebastiánNew records Serra 1, Federico of Quintans freshwater 3 and Marcelo fish Loureiro for 1* Uruguay D 1 Universidad de la República. Facultad de Ciencias, Sección Zoología Vertebrados. Iguá 4225. CP 11400. Montevideo, Uruguay. RAPHIC G 2 Universidad de la República. Facultad de Ciencias, Departamento de Ecología, Grupo de Ecología y Rehabilitación de Sistemas Acuáticos. Iguá EO 4225. CP 11400. Montevideo, Uruguay. 3 Universidad de la República. Facultad de Ciencias, Sección Limnología. Iguá 4225. CP 11400. Montevideo, Uruguay. G N * Corresponding author. E-mail: [email protected] O OTES Abstract: N for Uruguay in the middle and lower Uruguay River basin, extending their current distribution: Cyanocharax alegretensis Based on National CollectionsLeporinus records, lacustris this Amaral article Campos, presents 1945; the first Microglanis report of aff. eight eurystoma freshwater Malabarba fish species and Mahler, 1998; Tatia boemia Koch and Reis, 1996; Lepthoplosternum pectorale (Boulenger, 1895); Crenicichla missioneira MalabarbaLucena and and Kullander, Weitzman, 1992; 2003; C. minuano Lucena and Kullander, 1992; Apistogramma borellii Regan, 1906. These species were previously recorded either for upper Uruguay River or Paraná River. Scarce knowledge about number and distribution of and transverse scale series (33 and 4/4) that distinguish it species limits not only our understanding of the ecological from the other Leporinus species of the area, L. obtusidens and evolutive processes but also affect our capacity to (Valenciennes, 1837). The specimen was collected in Isla use this information in conservation management plans del Zapallo, a depositional island of the Uruguay River (Maitland 1995). As occurs in the whole Neotropical (Figure 2D). region, the knowledge about the freshwater ichthyofauna of Uruguay is clearly incomplete. Freshwater systems of Characidae: Uruguay include part of the middle and lower sections of Cyanocharax alegretensis (Figure 1B) The specimens recorded present the external Río de la Plata and Atlantic Ocean, and the southwestern appearance of Cyanocharax species and some of the Merinthe Uruguay Lagoon river, basin small (Patos-Merin coastal drainages system). flowing Nión into et theal. distinguishing characters proposed for the genus by however that list did not provide distributional data, or(2002) specimens presented voucher a list locations,of the fish and species was ofbased the country,only in Malabarba and Weitzman (2003): two unbranched bibliographic sources, some of them outdated. As part of and eight branched dorsal-fin rays, one branched and six branched pelvic-fin rays, anterior mouth with Uruguay, we reviewed of Facultad de aCiencias, general Montevideo,taxonomic revision Uruguay. of Infreshwater this note fishwe reportspecies the of the fish collection extending their current distribution. firstSpecimens record of eightreported freshwater belong fishto Facultad species forde Uruguay,Ciencias (Institutional code: ZVC-P), Montevideo, Uruguay. Details of analyzed lots are given in Apendix 1. Characiformes (2003) (Cyanocharax) and Casciotta et al. (2005) (wereLeporinus identified); Siluriformes according acording to Malabarba to Sacramento-Soares and Weitzman and Martins-Pinheiro (2008) and Koch and Reis (1996) (Tatia), Malabarba and Mahler (1998) (Microglanis), and Reis (1997) (Lepthoplosternum); Cichlidae according to Lucena and Kullander (1992) (Crenicichla), and Casciotta et al. (2005) (Apistogramma). Anostomidae:Order Characiformes Figure 1. Specimens photographs: A. Leporinus lacustris (ZVC-P 2751); B. Cyanocharax alegretensis (ZVC-P 8131); C. Lepthoplosternum pectorale Leporinus lacustris (Figure 1A) (ZVC-P 5337); D. Microglanis aff. eurystoma (ZVC-P 940); E. Tatia boemia The specimen presents the characteristic anterior (ZVC-P 8210); F. Apistogramma borellii (ZVC-P 8133); G. Crenicichla teeth morphology plus a reduced number in longitudinal missioneira (ZVC-P 6884); H. Crenicichla minuano (ZVC-P 7078). Scale bars represent 1 cm. Check List | Volume 6 | Issue 2 | 2010 191 Zarucki et al. | New records of freshwater fish for Uruguay Figure 2. Distribution maps of species recorded: A. Study area represented by black rectangle; B. Red triangles = Crenicichla minuano, Yellow circle = Apistogramma borellii; Light blue circle = Cyanocharax alegrentensis; C. Green triangle = Tatia boemia, Blue stars = Lepthoplosternum pectorale, Orange circle = Microglanis aff. eurystoma; D. Violet stars = Crenicichla missioneira, Cyan triangle = Leporinus lacustris. unspecialized teeth, and incompletely toothed maxilla; Microglanis aff. eurystoma (Figure 1D) they can be recognized as C. alegretensis by the interrupted Specimens present all external characteristics of the genus (Malabarba and Mahler 1998) and the diagnostic characteristics of the species: extremely large mouth gape sheathlateral line,of scales, anal fin consisting origin along of 1 the row vertical with 17 through small dorsalscales and squarish head shape. This species was collected in fin-origin, branched anal fin rays 25, anal fin with a basal the middle Cuareim River, the northern tributary of the Uruguay River in Uruguay (Figure 2C). covering the bases of unramified and first 12 ramified Riveranal-fin close rays. to Specimens the Cuareim were River recently outlet collected(Figure 2A). in Laguna Auchenipteridae: Redonda (Franquia) a floodplain lagoon of the Uruguay Tatia boemia (Figure 1E) The specimen presents all the externally recognized characteristics of the genus proposed by Sacramento- Callichthyidae:Order Siluriformes Lepthoplosternum pectorale (Figure 1C) in males and caudal peduncle laterally compressed and Specimens recorded present external characteristics of deepSoares with and middorsalMartins-Pinheiro keel. Furthermore (2008): anal itfin presented base reduced the Callichthyinae and the coracoids exposed ventrally, caudal diagnostic characteristic of the species consisting in a unique body pigmentation pattern. The specimen was permits the recognition of Lepthoplosternum. The number recently collected in the middle Cuareim River (Uruguay offin dorsal convex, and one ventral dorsal lateral spine plates, and the7 branched body width rays allows that River basin) (Figure 2B). us to classify these specimens as L. pectorale this species in the Uruguay River basin at two different . We found Uruguay and in Esteros de Farrapos a wetland system Cichlidae:Order Percifomes (Nationallocalities, Protecteda modified Area) wetland of the in lower the northernsection of region the river of Apistogramma borellii (Figure 1F) (Figure 2B) with dermal lobe, characteristic of Geophaginae plus Pseudopimelodidae: scalesSpecimens of the anterior recorded section present of lateral the firstline separatedbranchial fromarch Check List | Volume 6 | Issue 2 | 2010 192 Zarucki et al. | New records of freshwater fish for Uruguay of A. borellii. Specimens were collected in Laguna Redonda, the presence of Leporinus lacustris, Lepthoplosternum dorsal fin base by 1 scale and body side blue characteristic pectoralelargest tributary, and Apistogramma of the lower borellii Uruguay registered River. We from report the close to the Cuareim River outlet (Figure 2A). middle Paraná River (Casciotta et al. 2005) in the middle Franquia, a floodplain lagoons adjacent to Uruguay River and lower Uruguay River, this evidence that ictiogeographic Crenicichla missioneira (Figure 1G) zonation of the Uruguay River and its relationship with the Specimens recorded present the diagnostic characters: Paraná River basin are not resolved yet. absent or reduced suborbital stripe, a row of blotches along the middle of the side, dark dots only present on the caudal Acknowledgments: This article was partially funded by Dirección peduncle, upper and lower lip folds interrupted anteriorly, lips not lobed, and lower jaw distinctly prognathous. Uruguay), Programa de Desarrollo Tecnológico (Proyecto: 71/08), and PEDECIBANacional de (Programa Hidrografía de (Ministeriodesarrollo dede lasTransporte Ciencias Básicas).y Obras Públicas,M.L. and Specimens with these characteristics are present in many F.T.M are funded by Sistema Nacional de Investigadores. This manuscript localities along Uruguay River main course and tributaries, was improved by the comments of two anonymous reviewers. lower Uruguay River, the Negro River (Figure 2D). Literature Cited including several localities in the largest effluent of the Casciotta, J., A. Almirón and J. Bechara. 2005. Peces del Iberá-Habitat y C. minuano (Figure 1H) Diversidad. Corrientes: Fundación Ecos. 244 p. Specimens recorded present the diagnostic characters: Tatia boemia. A new species of absent or reduced suborbital stripe, a row of blotches Koch,drainage, W.R. and southern R.E. Reis.Brazil. 1996. Ichthyological Exploration of Freshwaters along the middle of the side, dark dots only present on the 7:auchenipterid 85-90. catfish (Teleostei, Siluriformes) from the Río Uruguay Lucena, C.A.S. and S.O. Kullander. 1992. The Crenicichla (Teleostei: caudal peduncle, upper and lower lip folds interrupted Cichlidae) species of the Uruguai River drainage in Brazil. anteriorly, lips not lobed, and lower jaw isognathous. The Ichthyological Exploration of Freshwaters 3(2):
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