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Ectrepopterus Uruguayensis (Fowler, 1943): New Record for Argentina

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Ectrepopterus Uruguayensis (Fowler, 1943): New Record for Argentina Check List 9(5): 1043–1045, 2013 © 2013 Check List and Authors Chec List ISSN 1809-127X (available at www.checklist.org.br) Journal of species lists and distribution N Ectrepopterus uruguayensis ISTRIBUTIO Actinopterygii, Characiformes, Characidae: D (Fowler, 1* and Fernando 1943): R. Carvalho New 2 record for Argentina RAPHIC G Amalia M. Miquelarena EO 1 Museo de La Plata, División Zoología Vertebrados. CONICET-La Plata. Paseo del Bosque s/n°, 1900. La Plata, BA, Argentina. G N 2 UNESP, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Instituto de Biociências, Letras e Ciências Exatas, Departamento de Zoologia e Preto, SP, Brazil. O Botânica, Programa de Pós-Doutoramento,[email protected] Laboratório de Ictiologia, Rua Cristóvão Colombo, 2265, Jardim Nazareth, 15054-000 São José do Rio OTES * Corrresponding author. E-mail: N Abstract: Ectrepopterus uruguayensis Fowler was recently redescribed, with occurrence in lower tributaries of Río de la Plata and lower Río Uruguay, Uruguay. Herein its occurrence is extended and confirmed to Argentina, arroyo El Molino, in Uruguay Department, Entre Ríos Province, Uruguay drainage. The monotypic genus Ectrepopterus Fowler was multifasciatus recently resurrected by Malabarba et al. (2012) for leaded Reichert Lang (2001, p. 104) erroneously Megalamphodus uruguayensis identify Ectrepopterus Eigenmann. uruguayensis This condition, as Hollandichthys probably, (up to 47.4 mm SL) which habit the Uruguayan drainages multifasciatus in Uruguay country. et al. 2012). Fowler, Diagnostic a small-sized characters fish for genus include: i) an incomplete foramen in posterior diagnose to Megalamphodus uruguayensis (= Ectrepopterus region(figure of7 ofmetapterygoid, Malabarba that serves as passage for the uruguayensisIn the original description, Fowler (1943) proposed as ramus mandibularis of the trigeminus nerve, bordered the upper lobe. This character is broadly found in the small posteriorly by the hyomandibula and forming an Characidae, and) the not lower constitutes lobe of thea diagnostic caudal fin character longer than for genus, as noted by Malabarba et al. (2012), because it is posterior margin of second infraorbital posteroventrally greatly variable amidst specimens. The photographed obliqueincomplete and arch; second ii) pectoral-fin infraorbital rays ventrally bearing hooks;bordering iii) anterior region of third infraorbital; iv) fourth infraorbital more developed longitudinally than dorsoventrally; v) byspecimen Malabarba from et the al. arroyo(2012). El Molino (Figure 1) shows this ascending process of premaxilla reaching just anterior end condition, which is absent in the specimenMegalamphodus of the figure 5 of nasal, vi) and lateral line interrupted (Malabarba et al. (Ectrepopterus) uruguayensis (= E. uruguayensis) from 2012). Fowler (1943) described Besides these characters, a conspicuous feature of few specimens or records for species has been cited in the Ectrepopterus uruguayensis Fowler is the zigzag pattern Uruguay, providing no further locality data. Ever since, Hollandichthys et al. 2010), until to redescription and literature (Géry 1972; Géry 1977; Weitzman and Palmer of narrow stripes on body (Figure 1), like 1997; Thomaz Figure 1. Ectrepopterus uruguayensis , ILPLA 1817, female, 44.6 mm SL, El Molino Creek, Entre Ríos Province, Argentina. 1043 Miquelarena and Carvalho | New record of Ectrepopterus uruguayensis for Argentina resurrection of Ectrepopterus by Malabarba et al. (2012), sp. C, Bryconamericus stramineus, Charax stenopterus, that listed many lots of this species but all them restricted Cheirodon interruptus, Diapoma terofali, Oligosarcus to Uruguay. jenynsii (Characidae); Hoplias malabaricus Ectrepopterus uruguayensis was Hisonotus maculipinnis, Hypostomus commersonii mentioned by Menni (2004) (as Hyphessobrycon (Loricariidae); Cnesterodon decemmaculatus (Erythrinidae); (Poeciliidae); uruguayensisFor Argentina,), but no voucher specimens was found in Australoheros cf. facetus, A. scitulus, Crenicichla scotti, and Gymnogeophagus meridionalis (Cichlidae). occurrence of this species, which was collected in an Additional examined material: collections to confirm this record. Herein we record the All from Uruguay: expedition in November 24, 2006 (by E. Etcheverry and L. ANSP 70331, holotype, female, 29.2 mm SL, 1935, F. Department.Protogino, in theTwo El femaleMolino Creekspecimens (Figure of 2). Ectrepopterus This stream Felippone. UFRGS 7899, 39.7 mm SL, arroyo Chapicuy uruguayensisflows into the wereUruguay collected River, Entrewith seineRíos Province, and deposited Uruguay at Chico, tributary of Río Uruguay on road 3, Paysandu, Paysandu, 31°37’20”S 57°52’51”W, 10 Sep 2005, L. R. Malabarba and party. UFRGS 7909, 9, 33.1-40.2 mm SL, Instituto de Limnología “Dr. Raúl A. Ringuelet” (ILPLA), La cañada Cecilia on road 3, km 512, Salto, Salto, 31°16’01”S Plata, Argentina (ILPLA 1817). 57°46’42”W, 9 Sep 2005, L. R. Malabarba and party. UFRGS 7918, 2, 38.9-44.4 mm SL, cañada on road 4, tributary of TableRío Queguay 1. Morphometric Grande, and meristicPaysandu, data of twoPaysandu, females of 32°12’25”SEctrepopterus uruguayensis from arroyo El Molino, Uruguay Department, Entre Ríos, ArgentinaCHARACTER Province. A B Standard length (mm) 40.0 44.6 Percents of standard length Predorsal distance 56.1 Prepelvic distance 50.6 56.3 Prepectoral distance 49.6 Preanal distance 62.6 65.7 31.0 29.5 46.7 42.6 Caudal peduncle depth 14.2 14.4 Deph at dorsal-fin origin Caudal peduncle length 10.4 Geographical record of in Figure 2. Ectrepopterus uruguayensis 9.6 Uruguay River drainage. Anal-fin base 31.0 29.9 Argentina: arroyo del Molino, Entre Ríos Province, Uruguay Department, Dorsal-fin base 29.1 28.6 Counts and measurements in both individuals followed Pelvic-fin length 19.8 16.3 Head length 27.1 Pectoral-fin length 19.6 19.0 Percents of head length with a caliper rule to the nearest 0.01 mm, on the left side 26.9 ofFink the and specimen, Weitzman and (1974).presented Measurements as percents ofwere standard made Snout length 24.4 Upper jaw length 56.5 55.7 length (SL) or head length (HL). Counts of vertebrae, 21.8 Orbital diameter Interorbital width 39.0 37.3 Counts supraneurals, gill-rakers of the first arch, branchiostegal 32.7 32.1 rays, procurrent caudal-fin rays, and small dentary teeth i,10 i,12 were taken in cleared and stained (c&s) individual prepared Dorsal-fin rays ii,9 ii,9 i,7 i,7 theaccording fused PU1+U1 to Taylor of and the van caudal Dyke region (1985). as aVertebral single element. counts Pectoral-fin rays iii,22 Morphometricinclude the four and vertebrae meristic in data the areWeberian presented apparatus in Table and 1. Pelvic-fin rays Caudal principal rays i,17,i i,17,i Anal-fin rays iii,23 Our observations are congruent with the data provided Dorsal procurrent rays - 11 by Malabarba et al. (2012), except for ‘Predorsal distance’, Ventral procurrent rays - here 56.1-56.6% SL (vs. Perforated scales 7 7 8 vs. Scale longitudinal series 57.0-61.3% SL) and Head length 7 7 35 34 populations26.9-27.1% ofSL same ( species.27.5-32.8% SL). These differences 5 5 Scale rows/dorsal-fin origin > lateral line are minimal, and reflect the variability/polymorphismextensive watercourse, of Predorsal scales 12 11 Scale rows/lateral line > pelvic-fin origin with sections about 50 m wide and pools over 2 Scale rows around caudal peduncle 14 14 El Molino creek is a relatively other plants, and the bottom consists of mud and clay Total vertebrae - Anal-fin base scales 8 8 m deep. TheEctrepopterus banks are vegetateduruguayensis with weregrasses found and Supraneurals - 6 33 in river- side of stream (ca. - 6 (Figurepopulation 3). density. Species collected syntopically with - 11 E. Gill rakers on upper limb were: 32°25’S 58°16’W),, in low Premaxilla teeth - 7 uruguayensis Cyphocharax spilotus Steindachnerina Gill rakers on lower limb biornata (Curimatidae); Characidium rachovii, C. tenue Maxilla teeth - 10 (Crenuchidae); Astyanax Astyanax sp. B, Astyanax Dentary teeth - 5+13 sp. A, 1044 Miquelarena and Carvalho | New record of Ectrepopterus uruguayensis for Argentina Acknowledgments: of Louisiana at Lafayette) by photos of Ectrepopterus uruguayensis; We wish thank to Tiago Carvalho (University 57°12’47”W, 10 Sep 2005, L. R. Malabarba and party. UFRGS 7945, 36.9 mm SL, cañada on road 4, tributary Vinicus Bertaco (FZB) by suggestions and information, and Juan Marcos of Río Queguay Chico, Paysandu, Paysandu, 32°01’57”S Mirande (CONICET) by suggestions in the review. FRC is supported by a postdoctoral fellowship from FAPESP (Fundação de Amparo à Pesquisa 57°19’30”W, 10 Sep 2005, L. R. Malabarba and party. doLiterature Estado de CitedSão Paulo) (proc. 2011/11422-8). Fink,Characidae). W.L. and S.H. Smithsonian Weitzman. Contributions 1974. The so-called of Zoology Cheirodontin 172: 1-46. fishes of Central America with descriptions of two new species (Pisces: from Uruguay. Proceedings of the Academy of Natural Science of Fowler,Philadelphia H.W. 1943. Notes and descriptions of new or little known fishes 95: 311-334. Géry,several J. 1972. of their Corrected genera. andStudies supplemented on the Neotropical descriptions Fauna of certain characoid Characoidsfishes described of the Worldby Henry. Neptune W. Fowler, City: T.H.F. with Publications.revisions of 672 p. 7: 1-35. Géry, J. 1977. Atlas ilustrado de los peces de agua dulce del Uruguay Reichert Lang, J.J. 2001. Revalidation of the genus. Rocha: Ectrepopterus PROBIDES. Fowler327 p. (Teleostei: Characiformes), with Malabarba,the redescription L.R., V.A. Bertaco, of its type F.R. Carvalho species, andE. uruguayensis T.O. Litz. 2012.. Zootaxa 47-60. Menni, R.C. 2004. Peces y ambientes en la Argentina continental 3204:. o 5, Monografias del Museo Argentino de Ciencias Naturales, N Buenos Aires. 316 p. Taylor,study. W.R. Cybium and G.C. Van Dyke. 1985. Revised procedures for staining and clearing small fishes and other vertebrates for bone and cartilage placement of Hollandichthys 9: 107-119. Thomaz,and relatedA.T., L.R. genera. Malabarba Molecular and S.L. Phylogenetics Bonatto.
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