Revista de la Sociedad Entomológica ISSN: 0373-5680 [email protected] Sociedad Entomológica Argentina Argentina

FUENTES, María Cecilia; MAUAD, Melina Pseudosmittia adunca & P. joaquimvenancioi (Diptera: ), first records from Argentina Revista de la Sociedad Entomológica Argentina, vol. 74, núm. 1-2, 2015, pp. 89-91 Sociedad Entomológica Argentina Buenos Aires, Argentina

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ISSN 0373-5680 (impresa), ISSN 1851-7471 (en línea) Revista de la Sociedad Entomológica Argentina 74 (1-2): 89-91, 2015

Pseudosmittia adunca & P. joaquimvenancioi (Diptera: Chironomidae), first records from Argentina

FUENTES, María Cecilia & Melina MAUAD

Instituto de Limnología Dr. Raúl A. Ringuelet (ILPLA). CONICET - CCT La Plata. FCNyM, UNLP. 122 y 60, La Plata 1900, Buenos Aires, Argentina. E-mail: [email protected]; [email protected]

Pseudosmittia adunca & P. joaquimvenancioi (Diptera: Chironomidae), primer registro de la Argentina

RESUMEN. A partir de los ejemplares del género Pseudosmittia registrados en dos localidades de la provincia de Buenos Aires (Argentina), se extiende la dis- tribución geográfica de P. adunca y P. joaquimvenancioi. Además, el nuevo mate- rial de P. adunca nos permite ampliar su diagnosis.

PALABRAS CLAVE. . Pseudosmittia. Distribución geográfica. Río Salado. Punta Lara.

ABSTRACT. Based on specimens of the genus Pseudosmittia recorded from two localities of the province of Buenos Aires in Argentina, the geographic distribution of P. adunca and P. joaquimvenancioi is extended. In addition, the new material of P. adunca allows us to expand its diagnosis.

KEYWORDS. Orthocladiinae. Pseudosmittia. Geographical distribution. Salado . Punta Lara.

Pseudosmittia Edwards, 1932 is one of the by Paggi (2009). Morphological terminology and largest and diverse genera within the Orthocla- measurement standards follow Sæther (1980). diinae, with worldwide distribution. Their repre- The material is housed in the collection of the sentatives present terrestrial or semi-terrestrial Museo de La Plata, Argentina (MLP). habits and can be found on the borders of swamps, ponds and streams with vegetation Pseudosmittia joaquimvenancioi (Messias (Epler, 2001). Andersen et al. (2010) reviewed & Oliveira, 2000) this genus in the Neotropics, establishing 23 species and one morphotype. Later, Mauad et Material examined. ARGENTINA: Buenos al. (2013) described a new Pseudosmittia spe- Aires Province, Junín, Río Salado, 34° 37’ 12.6’’ cies occurring in the pampean biogeographical S- 60° 58’ 05.1’’ W, 30-III-2011, Sweep net, Do- province of Cabrera & Willink (1973). nato,M. & Siri, A.cols, 1 male (MLP). Based on material collected in two localities of in Argentina, the geo- Comments. Pseudosmittia joaquimvenan- graphic distribution of Pseudosmittia adunca cioi is common in the Neotropical Region, the Andersen et al. and P. joaquimvenancioi (Mes- geographical distribution for this species is sias & Oliveira) is expanded. Furthermore, the extended from Mexico, Costa Rica, Venezuela study of the new specimens of P. adunca allows and Brazil (Andersen et al., 2010). New mate- us to expand its diagnosis. rial collected in Argentina allows us to extend its The studied specimens were mounted in Can- distribution to Buenos Aires, down to Río Salado ada balsam following the procedures described as the southern border.

Recibido: 20-II-2015; aceptado: 28-IV-2015 89 Revista de la Sociedad Entomológica Argentina 74 (1-2): 89-91, 2015 The Salado River, located at north-centre of Brachiolum with 1 seta, other veins bare. Buenos Aires province is the most important ef- Legs. Width at apex of front tibia 22–27 μm; fluent of Rio de La Plata catchment. It is char- of middle tibia 22–30 μm; of hind tibia 22–37 μm. acterized by high concentrations of phosphates Lengths and proportion of legs in Table 1. and phytoplanktonic species showing the river’s eutrophication (Gabellone et al., 2005, 2013). Hypopygium. Anal point 16–25 μm long, tergite The disturbance of this river could be related to IX with 14–16 setae. Laterosternite IX with 3–4 se- the surrounding agricultural practice and to the tae. Phallapodeme 64–95 μm long; transverse ster- waste waters from the urban area that flow into it. napodeme 54–65 μm long. Virga 18–24 μm long. P. joaquimvenancioi is frequent in this kind of en- Gonocoxite 145–186 μm long. Superior vol- vironments, since it has always been found at ar- sella 37–44 μm long. Median volsella double; eas that displayed some kind of disturbance such dorsal lobe bare, projecting anteriomedially, as agriculture, urbanization, sedimentation, etc. 45–50 μm long; ventral lobe projecting poste- riomedially, fringed with strong microtrichia, Pseudosmittia adunca Andersen et al., 2010 40–42 μm long. Inferior volsella double, anterior lobe 10–16 μm long (4); median lobe with fringe Material examined. ARGENTINA: Buenos Aires of strong microtrichia at apex, 20–27 μm long. Province, Reserva Natural Integral Mixta Punta Lara, Gonostylus 54–60 μm long, megaseta 10–14 μm El Zanjón, 34° 47’ 33.8’’ S- 57° 59’ 52.5’’ W, 7-VIII- long. HR 2.64–3.26; HV 3.33–3.62. 2013, Sweep net, Donato, M. col, 9 males (MLP). Male (n=5 except when otherwise stated) Comments. Thus far, Pseudosmittia adunca Total length 1.8–2.17 mm. Thorax length has been mentioned only for two localities of 0.55–0.75 mm. Abdomen length 1.23–1.42 mm. Santa Catarina State in northeast Brazil (Ander- Total length/wing length 1.41–1.79 mm, wing sen et al, 2010). From the new material incorpo- length/profemur length 2.84–3.30 mm. rated in this work, we can extend the geographic Head. AR 0.97–1.07. Antenna with 13 flag- distribution of this species, and establish Punta ellomeres. Terminal flagellomere 339–370 μm Lara Reserve (Buenos Aires, Argentina) as its long. Tentorium 112–124 μm long and 17–20 μm southernmost distribution. wide. Stipes 90–124 μm long and 6–6 μm wide. Punta Lara Reserve has been of great interest Five inner vertical setae; clypeus with 5–11 se- for numerous scientists and naturalists long be- tae. Length of palpomeres (1–5): 20–26 μm, 32– fore its incorporation to the System of Protected 36 μm, 62–74 μm, 72–78 μm, 90–110 μm. Natural Areas of Buenos Aires province in 2007. Thorax. Antepronotum with 1 lateral seta. This interest can be attributed to the habitat Acrostichals 2. Dorsocentrals 8–10; prealars 4; heterogeneity (rain forest, grasslands and wet- supraalar 0. Scutellum with 6–7 setae. lands) that encourages high diversity of floristic Wing. Length 1.12–1.28 mm. VR 1.35–1.49. and faunistic species, and also to the cultural

Table 1. Lengths (in μm) and proportions of legs of Pseudosmittia adunca (male, n = 5). Ab- breviations: Femur (fe); Tibia (ti); Tarsomeres 1–5 (Ta1-5); Leg Ratio (LR), ratio of metatarsus to tibia; “Beinverhaltnisse” (BV), combined length of femur, tibia, and basitarsus divided by combined length of tarsomeres 2–5; “Schenkel-Scheine-verhältnis” (SV), ratio of femur plus tibia to metatarsus.

fe ti ta1 ta2 ta3

P1 378–430 347–473 166–205 71–95 55–75

P2 497–598 395–521 189–252 87–126 71–95

P3 481–513 402–529 221–292 110–142 103–142

ta4 ta5 LR BV SV

P1 32–47 39–55 0.41–0.57 3.60–4.09 3.68–4.54

P2 39–55 39–55 0.45–0.48 3.90–4.17 4.12–4.43

P3 39–55 39–55 0.52–0.55 3.32–3.49 3.57–3.75

90 FUENTES, M. C. & M. MAUAD. First records of Pseudosmittia for Argentina and historical importance of the location. wards, 1932 (Diptera: Chironomidae). Zootaxa 2472: 1-77. CABRERA, A. & A. WILLINK. 1980. Biogeografía de América The Reserve has many and plant spe- Latina. Organización de Estados Americanos. Serie de cies that also occur in the Paranean rain forest Biología. Monografia No. 13, Washington D.C. of northeastern Argentina and Brazil. Across CABRERA, A. L. & G. DAWSON. 1944. La Selva Marginal de Punta Lara en la Ribera Argentina del Río de La Plata. Revis- the Uruguay and Paraná , the rain forest ta del Museo de La Plata, Sección Botánica 5 (22): 267-382. reaches its southernmost distribution in Punta EPLER, J. H. 2001. Identification manual for the larval Chironomidae (Diptera) of North and South Carolina. A guide to the Lara (Cabrera & Dawson, 1944). The species of the midges of the 200 southeastern United States, including P. adunca is one of the so many species that Florida. Special Publication SJ2001-201 SP13, North Carolina. shows this distributional pattern. http://home.earthlink.net/~johnepler/index.html GABELLONE, N. A., M. C. CLAPS, L. C. SOLARI & N. C. NE- SCHUK. 2005. Nutrients, conductivity and plankton in a ACKNOWLEDGEMENTS landscape approach to a Pampean saline lowland river (Salado River, Argentina). Biogeochemistry 75: 455–477. GABELLONE, N. A., M. C. CLAPS, L. C. SOLARI, N. C. NE- We would like to thank park ranger Juan Pablo SCHUK & D. M. ARDOHAIN. 2013. Spatial and temporal Carricart of the Reserva Natural Integral Mixta distribution pattern of phosphorus fractions in a saline low- land river with agricultural land use (Salado River, Buenos Punta Lara. We also thank Mariano Donato for his Aires, Argentina). Fundamental and Applied Limnology contributions and suggestions. This paper is the 183(4): 271–286. MAUAD, M., M. DONATO & A. SIRI. 2013. New species of Scientific Contribution Nº 960 of the Institute of Pseudosmittia Edwards, 1932 and new records of Allocla- Limnology “Dr. R. A. Ringuelet” (ILPLA, CCT-La dius Kieffer, 1913 (Diptera: Chironomidae, Orthocladiinae) from South America. Zootaxa 3694: 445–460. Plata, CONICET, UNLP). PAGGI, A. C. 2009. Diptera. Chironomidae. In: Domínguez, E. & H. R. Fernández (eds.), Macroinvertebrados Bentónicos Sudamericanos. Sistemática y Biología, Fundación Miguel LITERATURE CITED Lillo, Tucumán, pp. 383–409. SÆTHER, O. A. 1980. Glossary of chironomid morphology ter- ANDERSEN, T., O. A. SAETHER & H. F. MENDES. 2010. Neo- minology (Diptera: Chironomidae). Entomologica Scandi- tropical Allocladius Kieffer, 1913 and Pseudosmittia Ed- navica Supplement 34: 1–532.

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