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Cyanocharax Alburnus (Hensel, 1870) (Characiformes: Characidae): First Distribution Record in Argentina Istributio D Lucila C

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Cyanocharax Alburnus (Hensel, 1870) (Characiformes: Characidae): First Distribution Record in Argentina Istributio D Lucila C Check List 8(3): 581-583, 2012 © 2012 Check List and Authors Chec List ISSN 1809-127X (available at www.checklist.org.br) Journal of species lists and distribution N Cyanocharax alburnus (Hensel, 1870) (Characiformes: Characidae): First distribution record in Argentina ISTRIBUTIO D Lucila C. Protogino 1,2* and Amalia M. Miquelarena 1,2 RAPHIC G EO 1 Instituto de Limnología “Dr. Raúl A. Ringuelet” (CONICET CCT La Plata-UNLP). CC 712, 1900. La Plata, BA, Argentina. G 2 Museo de La Plata, División Zoología Vertebrados. Paseo del Bosque s/n, 1900. La Plata, BA, Argentina. N * Corresponding author. E-mail: [email protected] O OTES N Abstract: This note reports the presence of Cyanocharax alburnus in the Argentinian Mesopotamia. This represents the southern distributional limit for the species in South America and the first record for Argentina’s fresh water fish fauna. The genus Cyanocharax Malabarba and Weitzman, 2003, included in the family Characidae, comprises small- sized species: C. alburnus (Hensel, 1870), C. alegretensis Villaguay creek is a relatively extensive watercourse, with Malabarba and Weitzman, 2003; C. dicropotamicus thesome bottom sectors consists about 50of mudm wide and and clay. pools Entre over Ríos 2 province m deep. Malabarba and Weitzman, 2003; C. itaimbe Malabarba and The banks are vegetated with grasses and other plants, and Weitzman, 2003; C. lepiclastus Malabarba, Weitzman and one of the areas of highest biodiversity in Argentina (López Casciotta, 2003; C. tipiaia Malabarba and Weitzman, 2003 etrepresents, al along with the rest of the Mesopotamic region, and C. uruguayensis Atlantic drainage basins in southeastern Brazil, in the states . 2005). C. alburnus of Rio Grande do Sul and(Messner, Santa Catarina 1962) known and in theonly Uruguay for the The specimens we collected in Villaguay creek River drainage basin in Brazil, Uruguay and Argentina. were identified as by the possession of two unbranched and eight branched rays in the dorsal fin, one unbranched and six branched rays in the pelvic fin, four These characids are identified by the following diagnostic unbranched and 20-24 branched rays in the anal fin, total absencecharacters: of caudalpresence and ofanal two glands unbranched or specialized and organ;eight number of scales in lateral-line row 37-38, scale rows presencebranched raysof one in theunbranched dorsal fin; and absence six branched of insemination; rays in between dorsal-fin and lateral line 5, scale rows between C.lateral alburnus line byand the pelvic-finpresence oforigin a complete 3 and seriesunpigmented of 36 to unspecialized teeth, and lack of ventrally located mouth 39adipose perforated fin. Malabarba lateral-line and scales, Weitzman a character (2003) that diagnose sets it the pelvic fin; possession of clearly anterior mouth with C. alegretensis, C. lepiclastus, C. tipiaia and C. uruguayensis). with modified maxillary, premaxillary and dentary bones; apart from those species with interrupted lateral line ( andbranched Weitzman rays 2003).in the anal fin ranging from 21 to 35; and distinguishes it from C. dicropotamus and C. itaimbe. incompletely toothed maxilla, with 2 to 8 teeth (MalabarbaC. Additionally, the presence of an unpigmented adipose fin alburnus (Figure 1, Table 1) from Villaguay creek in In November 2004, we collected 4 specimens of Department, part of the Gualeguay River basin in Entre Ríosthe beach province, sector at 31°55’00” LPS, 59°03’00”N°4892/70, W, (Figure Villaguay 2). scientific permit Figure 1. Cyanocharax alburnus, ILPLA 2172, female, 38.1 mm, Villaguay Figure 2. Habitat of Cyanocharax alburnus, Villaguay creek, Entre Ríos creek, Entre Ríos Province, Argentina. Province, Argentina. 581 Protogino and Miquelarena | Cyanocharax alburnus in Argentina Table 1. Morphometric and meristic data of Cyanocharax alburnus from Argentina. CHARACTER Low High Mean SD Standard length (mm) (SL) 39.9 38.0 1.74 As a percentage of SL 35.7 60.8 0.99 1.23 Snout to anal-fin origin 58.4 59.6 43.2 44.0 43.7 0.38 Snout to dorsal-fin origin 50.9 53.7 52.7 11.0 12.1 11.7 Snout to pelvic-fin origin 29.4 31.9 30.7 1.09 Dorsal- fin base length 0.51 Caudal peduncle length 12.2 14.3 13.3 0.87 Anal- fin base length Caudal peduncle depth 10.1 11.4 10.9 0.62 28.9 30.9 29.9 0.84 21.6 23.1 1.82 Depth at dorsal-fin origin 16.7 17.7 17.2 0.47 Dorsal-fin height 25.7 13.4 13.4 13.4 0.00 Pelvic-fin length males 19.7 23.4 22.1 1.73 Pelvic-fin length females Bony head length 22.1 23.6 22.9 0.61 Pectoral-fin length As a percentage of HL Snout length 23.3 27.1 1.79 38.4 42.1 1.74 25.4 Horizontal eye diameter 32.1 38.4 3.00 Upper jaw length 39.5 31.6 36.8 33.2 Figure 3. Geographic distribution of Cyanocharax alburnus, black square: 35.9 Counts Villaguay creek, Entre Ríos Province, Argentina and black circle: localities Least interorbital width 2.45 cited in the literature (Malabarba 1983). ii,8 ii,8 ii,8 0.00 10 12 11 0.96 Dorsal-fin rays i,6 i,6 i,6 0.00 Pectoral-fin rays Acknowledgments: We are grateful to Carlos A. Lucena from Museu 19 24 22 2.16 de Ciências e Tecnologia (PUCRS), Brazil, for the loan of comparative Pelvic-fin rays Scales in lateral line 37 38 38 material. Anal-fin rays 0.000.58 Literature Cited line Scales rows between dorsal-fin origin and lateral 35 35 35 0.00 Predorsal scales 11 13 12 0.96 Fink,Characidae). W.L. and S.H. Smithsonian Weitzman. Contributions 1974. The so-called to Zoology Cheirodontin 172: 1-46. fishes Scales rows between lateral line and pelvic-fin origin López,of CentralH.L., A.M. America Miquelarena with a anddescription J. Ponte Gómez.of two new speciesBiodiversidad (Pisces: 8 7 1.26 In F.G. Outer premaxillary teeth 4 4 4 0.00 Scale sheath on anal-fin base 5 Aceñolaza (coord.). Temas de la Biodiversidad2005. del Litoral fluvial Inner premaxillary teeth 4 yargentino Distribución II. San de Miguel la Ictiofauna de Tucumán: Mesopotámica; INSUGEO (Miscelánea p. 311-354 14). Maxillary teeth 2 4 1.26 López, H.L., R.C. Menni, M. Donato and A.M. Miquelarena. 2008. 5 5 0.58 Biogeographical revision of Argentina (Andean and Neotropical Dentary teeth 4 4 4 0.00 5 Journal of Biogeography Smaller dentary teeth 7 9 8 Malabarba,Regions): L. anR. analysis1983. Resdescrição using freshwater e discussão fishes. da posição taxonómica 1.15 de35: Astyanax1564-1579. hasemani Eigenmann, 1914 (Teleostei, Characidae). According to Malabarba and Weitzman (2003), Comunicações do Museu de Ciências da PUCRS 28: 177-199. Malabarba, L.R. and S.H. Weitzman. Cyanocharax suggesting they belong to a clade of South American a discussion of a putative characid2003. clade Description (Teleostei: of a newCharaciformes: genus with species have pelvic- and anal-fin hooks, Characidae).six new species Comunicações from southern do Museu Brazil, de Uruguay Ciências andda PUCRS Argentina, 16(1): with 67- Revised procedures for staining and characiformsThese records with represent fin hooks. the Wesouthernmost also observed limit thefor 151. thispresence species of bony(Figure hooks 3); onaccording the dorsal to fin.the biogeographical Taylor,study. W.R. Cybium and Van 9: Dyke,107–119. G.C. 1985. clearing small fishes and other vertebrates for bone and cartilage proposal of López et al Great Rivers Province. : December 2011 The examined specimens. (2008), are they deposited are located at within Instituto the : March 2012 Received : June 2012 de Limnología “Dr. Raúl A. Ringuelet” (ILPLA) and Museo Accepted : Sergio Maia Queiroz Lima de La Plata (MLP). We also examined specimens from the Published online collection of the Museu de Ciências e Tecnología PUCRS, AppendixEditorial responsibility1. Museum records of species analyzed. ILPLA: Instituto de Limnología “Dr. Raúl A. Ringuelet” (CONICET-UNLP), La Plata, Buenos Brazil. Aires, Argentina, MLP: Museo de La Plata, Buenos Aires, Argentina and Weitzman (2003). Measurements to the nearest 0.01 Ciências e Tecnologia, Porto Alegre RS, Brasil Identifications were made using Malabarba and MCP: Pontifícia Universidade Católica do Rio Grande do Sul Museu de Cyanocharax alburnus (37.4) mm SL, Entre Ríos Province, Department Villaguay, Gualeguay onmm one were specimen made using cleared a digital and stained caliper (c following &s) for boneFink and River basin, Villaguay: creekArgentina: on theILPLA beach 2172, area 3 of(1c&s), Villaguay 35.7-38,33 creek, Weitzman (1974). Osteological observations were made Protogino, 06/11/04; MLP 10177, 39.9 mm SL, the same data as above 31°55’00” S, 59°03’00” W, Col. A. Miquelarena, H. López, R. Menni and L. cartilage following the protocol by Taylor and Van Dyke (1985). and Brazil: MCP 7054, 10, 47.0-58.5 (54.2) mm SL, América do Sul, Rio 582 Protogino and Miquelarena | Cyanocharax alburnus in Argentina Grande do Sul, Guiaba, Lago Guaíba na Praia das Pombas, 30°20’40” S, Departments),26°46’00” S, 54° Uruguay 10’00” River W, on basin; the bridge Col.: R. of Filiberto RP 21, fromet al.; Paraiso07/01/01. about 51°02’29” W, Col. E.P. Lerner, L.R. Malabarba and I.A. Costa, 09/07/85; Cyanocharax7 Km down to uruguayensis the Salto de Moconá (border between San Pedro-Guaraní MCP 7066, 6, 33.4-39.6 (36.1) mm SL, América do Sul, Rio Grande do Sul, Province, Department San Pedro, Salto Horacio and Pepirí Miní stream, Tramandai, Rio Maquiné, junto á foz na lagoa dos Quadros, 29°44’00” : Argentina: ILPLA 1598, 39.2 mm SL, Misiones Cadeia,S, 50°10’00” abaixo W, da Col.
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