Revista de la Sociedad Entomológica

Argentina

ISSN: 0373-5680

pdellape@fcnym.unlp.edu.ar

Sociedad Entomológica Argentina

Argentina

TAFFAREL, Alberto; CASTILLO, Elio R. D.; ACUÑA, Fernando N.; KRAUCZUK, Ernesto;

MARANGONI, Federico; MARTÍ, Dardo A.

Aleuas uruguayensis Carbonell (Orthoptera, Acrididae, Copiocerinae): novel occurrence in the

Paranaense biogeographic province

Revista de la Sociedad Entomológica Argentina, vol. 73, núm. 3-4, diciembre, 2014, pp. 191-194

Sociedad Entomológica Argentina

Buenos Aires, Argentina

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191Recibido: 10-VII-2014; aceptado: 12-XI-2014

Aleuas uruguayensis Carbonell (Orthoptera, Acrididae, Copiocerinae): novel occurrence in the Paranaense biogeographic province

1 Laboratorio de Genética Evolutiva. Instituto de Biología Subtropical-Universidad Nacional de Misiones (IBS-UNaM), Félix de Azara 1552, Piso 6°, CP3300, Posadas, Misiones, Argentina. E-mail: radova@gmail.com2 Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917 (C1033AAJ), Ciudad Autónoma de Buenos Aires, Argentina.3 Comité Ejecutivo de Desarrollo e Innovación Tecnológica (CEDIT), Félix de Azara 1890, Piso 5º, CP3300, Posadas, Misiones, Argentina.

Aleuas uruguayensis Carbonell (Orthoptera, Acrididae, Copiocerinae): nueva ocurrencia en la provincia biogeográfica Paranaense

RESUMEN. El género neotropical Aleuas Stål 1878 está constituido por nueve es-pecies distribuidas a lo largo de América del Sur. Este género se encuentra cer-canamente relacionado con Adimantus Stål 1878, Zygoclistron Rehn 1905 y Epis-copotettix Rehn 1903 (Copiocerinae). Únicamente cuatro especies de Aleuas fue-ron descriptas en distintas provincias fitogeográficas en Argentina: A. gracilis Stål 1878, A. lineatus Stål 1878, A. paranensis Carbonell 2008 y A. vitticollis Stål 1878. En este trabajo proporcionamos nuevos registros de A. uruguayensis y brindamos un mapa de distribución geográfica actualizado, incluyendo las localidades co-nocidas en las que se encuentra esta especie. Confirmamos la presencia de A. uruguayensis por primera vez en Argentina, en cuatro localidades distantes a 450 kilómetros al noroeste del único registro conocido. De esta manera, ampliamos el rango de distribución de la especie y realizamos un aporte al conocimiento general de la diversidad de ortópteros de Argentina.

PALABRAS CLAVE. Aleuas. Distrito de los Campos. Biodiversidad. Orthoptera.

ABSTRACT. The Neotropical genus Aleuas Stål 1878 is constituted by nine recog-nized species, distributed in South America. This genus is closely related to Adi-mantus Stål 1878, Zygoclistron Rehn 1905 and Episcopotettix Rehn 1903 (Copio-cerinae). Only four species of Aleuas have been reported in Argentina, covering different phytogeographical provinces: A. gracilis Stål 1878, A. lineatus Stål 1878, A. paranensis Carbonell 2008 and A. vitticollis Stål 1878. In this contribution we pro-vide novel records for A. uruguayensis and illustrate the geographic distribution of the species. This work extends the known distribution range of the species as well as it contributes to the general knowledge on the Orthoptera diversity in Argentina.

KEY WORDS. Aleuas. Grasslands District. Biodiversity. Orthoptera.

TAFFAREL, Alberto1,2,3, Elio R. D. CASTILLO1,2,3, Fernando N. ACUÑA1, Ernesto KRAUCZUK1, Federico MARANGONI1,2 &

Dardo A. MARTÍ1,2

bonell, 2008; Eades et al., 2014).In Argentina, the Copiocerinae subfamily

is represented by four genera, Adimantus Stål 1878, Aleuas Stål 1878, Zygoclistron Rehn 1905 and Episcopotettix Rehn1903, (Carbonell et al.,

The Neotropical genus Aleuas Stål 1878 is currently constituted by nine recognized spe-cies, spanning a wide distribution range within southern South America (southern Brazil, Bo-livia, Paraguay, Uruguay and Argentina) (Car-

ISSN 0373-5680 (impresa), ISSN 1851-7471 (en línea) Revista de la Sociedad Entomológica Argentina 73 (3-4): 191-194, 2014

Nota Científica Scientific Note

Revista de la Sociedad Entomológica Argentina 73 (3-4): 191-194, 2014

192

bonell in 2008 from Cañada Las Yeguas, Lunarejo, Rivera Department, Uruguay (Carbonell, 2008) (Fig. 2). This locality is in the Pampeana biogeo-graphic province according to Cabrera and Willink (1973). It must be noted that for A. uruguayensis is the only record known to date (Eades et al., 2014).

This contribution attempts to provide novel records for A. uruguayensis and proposes a new geographic distribution map with all the known localities for this species.

During the summers of 2008 to 2013 A. uru-guayensis was collected in four localities within the Paranaense biogeographic province: Para-da Leis, Ñu Pyahú, Estancia “Tai Milagrosa” (Misiones) and Establecimiento “Santo Domin-go” (Corrientes) (Table I, Fig. 1).

A total of 47 individuals, 30 ♂ and 17 ♀ were

2006; Eades et al., 2014), although the presence of the latter must be confirmed for this country (Carbonell et al., 2006). The genera Aleuas and Zygoclistron constitute the Aleuasini tribe; even though both genera are similar in their external appearance, the general morphological as-pects of their species are different, especially those concerning body color and roughness of the integument (Carbonell, 1969, 2008).

Four species of Aleuas have been reported for Argentina, covering different phytogeographical provinces (Pampeana, Espinal, Chaqueña and Paranaense): A. gracilis Stål 1878, A. lineatus Stål 1878, A. paranensis Carbonell 2008 and A. vitticollis Stål 1878 (Cabrera & Willink, 1973; Carbonell, 2008; Eades et al., 2014).

Aleuas uruguayensis was described by Car-

Figs. 1-2. Geographical distribution of Aleuas uruguayensis. 1, New records from Misiones and Corrientes provinces (Argentina). 2, Historical record from Rivera department, Uruguay (Type locality).

TAFFAREL, A. et al. Aleuas uruguayensis: novel occurrence in Argentina

193

Figs. 3-7. Individuals of Aleuas uruguayensis from Estancia “Santo Domingo”, Corrientes province, Argentina. 3, male; 4, female; 5, lateral view showing the black area in the limit of metathoracic epimeron – episternum; 6, reddish colour at the end of female hind tibiae and black areas in femora (internal face); 7, black medial band on epiproct (dorsal view). Scales = 10 mm.

captured using an entomological net (Table I). Specimens were placed in bags and kept in cool-ers until their identification in the laboratory. Six morphometric measurements (total body length (TBL), hind femur length (F3L), hind tibia length (T3L), tegmina length (TegL), mid-dorsal prono-tum length (PL), and pronotum height (PH)) were registered using a digital caliper (0,001 mm). Additionally, the length from the front to the end of tegmina was measured in both sexes in order to compare with the measurements registered by Carbonell, 2008 (Table II).

Species identification was done following Carbonell (2008). Several diagnostic characters from the external morphology were identified, as the general buff coloration, the reddish and dark brown colour at the ends of hind tibiae in both sexes (Fig. 6), the distinct black area in the limit of metathoracic epimeron – episternum also found in males and females (Fig. 5). In females, the dor-sal parts of metanotum, the first abdominal terga

(as seen between the bases of the tegmina) and the black medial band on epiproct (Fig. 7) (Car-bonell 2008). Also, inner side of hind femora in females is yellow, widely marked with black (Fig. 6). Specimen vouchers are deposited in the Lab-oratorio de Genética Evolutiva, IBS-UNaM.

All male specimens of Aleuas uruguayensis collected were long-winged (macropterous) (Fig. 3) unlike females that presented reduced wings and tegmina (brachypterous) (Fig. 4). The species shows an evident sexual size di-morphism, with females being larger than males (body length ranging between 22-25 mm in males and 32-36 mm in females. Table II). Al-though morphometric measurements are in range with those in Carbonell (2008), mean val-ues obtained in this work are lower (Table II). A possible explanation for this difference may be attributed to the scarce number of individuals (only two males and one female) analyzed by Carbonell (2008).

Table I. Localities and number of individuals of Aleuas uruguayensis collected.

Localities Province Number of individuals (m/f) Geographical Coordinates

1. Parada Leis Misiones 4 / 1 27.594 S / 55.835 W

2. Estancia "Tai Milagrosa" Misiones 6 / 5 27.705 S / 55.796 W

3. Ñu Pyahú Misiones 3 / 3 27.490 S / 55.668 W

4. Estancia "Santo Domingo" Corrientes 17 / 8 27.680 S / 56.142 W

m / f = male / female.

Revista de la Sociedad Entomológica Argentina 73 (3-4): 191-194, 2014

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The collection sites are located within the Grass-land District (northeast of Corrientes and south-west of Misiones), a subdivision of the Paranaense province. This region with mean temperatures of 25 ºC in summer and 15.6 ºC in winter and average annual precipitation ranging from 1400 to 2400 mm (Giraudo et al., 2003) is characterized by savan-nas, diverse types of grasslands, Urunday (Astro-nium balansae Engl.) forest, wetlands and groves of Yatay palm (Butia yatay (Mart.) Becc.) (Giraudo et al., 2003). All sites surveyed were characterized by the presence of a nearby stream (coincident with Carbonell’s description of the type locality) and, with exception of Parada Leis, the remaining sites are lowlands with seasonal floods.

According to the distribution map of Aleuas (Carbonell, 2008), the genus spans in southern South America (between parallel 14º S and 40º S) (Eades et al., 2014). Despite this wide distribu-tion range, georeferenced data for each particular species of Aleuas are scarce and disperse with A. lineatus being the exception (Eades et al., 2014). This reflects the lack of existing knowledge on the patterns of distribution not only of Aleuas but also of the Copiocerinae subfamily in Argentina.

Thereby, the finding of A. uruguayensis for the first time in Argentina, allows us to largely increase the knowledge and distribution range of this species as well as to contribute general knowledge on the diversity of Orthoptera in our country, which is still far from adequate.

ACKNOWLEDGEMENTS

The authors are grateful to the two anonymous reviewers whose suggestions have substantially improved the manuscript. AT, ERDC and FNA are grateful to Diego Baldo and Darío Cardozo

CABRERA, A. L. & A. WILLINK. 1973. Biogeografía de América Latina. Monografía 13, Serie de Biología. Organización de los Estados Americanos, Programa Regional de Desarrollo Científico y Tecnológico, Washington D. C.

CARBONELL, C. S. 1969. Revision of the genus Zygoclystron Rehn, 1905 (Orthoptera: Acridoidea). Transactions of the American Entomological Society 95: 571-602.

CARBONELL, C. S. 2008. The genus Aleuas Stål 1878 (Acri-didae, Copiocerinae, Aleuasini). Journal of Orthoptera Re-search 17: 1-27.

CARBONELL, C. S., M. M. CIGLIANO & C. E. LANGE. 2006. Acridomorph (Orthoptera) species of Argentina and Uru-guay. Especies de Acridomorfos (Orthoptera) de Argentina y Uruguay. CD-ROM. Publications on Orthopteran Diversity. The Orthopterists’ Society at the Museo de La Plata.

EADES, D. C., D. OTTE, M. M. CIGLIANO & H. BRAUN. 2014. Orthoptera Species File. Version 5.0/5.0. [June 9, 2014]. <http://Orthoptera.SpeciesFile.org>.

GIRAUDO, A. R., H. POVEDANO, M. J. BELGRANO, E. KRAUCZUK, U. PARDIÑAS, A. MIQUELARENA, D. LIGI-ER, D. BALDO & M. CASTELINO. 2003. Biodiversity status of the Interior Atlantic Forest of Argentina. En: Galindo-Leal, C. & I. de Gusmão Cãmara (eds.) The Atlantic Forest of South America: biodiversity status, threats and outlook. Center for Applied Biodiversity Science at Conservation International, Island Press, Washington D.C., pp. 160-180.

REHN, J. A. G. 1903. A contribution to the knowledge of the Orthoptera of Mexico and Central America. Transactions of the American Entomological Society 29(1):13

REHN, J. A. G. 1905. Records of some Paraguayan Orthop-tera with the description of a new genus and species. En-tomological News 16: 39.

STÅL, C. 1878. Systema Acridiodeorum. Bihang till Kungligga Svenska Vetenskapsakademiens Handlinger 5(4):69.

LITERATURE CITED

Table II. Mean and Standard Deviation SD of seven morphometric characters of Aleuas uruguayensis.

Sex / n Statistics TBL F3L T3L TegL PL PH FTegL

F / 12

MeanRange

33,9932,05-36,84

16,6515,58-17,59

14,2212,94-15,34

9,248,47-10,06

8,508,17-9,07

6,045,7-6,46

22,2520,65-24,15

SD 1,38 0,57 0,73 0,45 0,27 0,22 1,11

M / 25

MeanRange

23,4822,13-25,23

11,7910,91-12,49

9,959,45-10,56

15,4714,20-17,01

4,984,47-5,41

3,593,33-4,00

23,6721,94-25,71

SD 0,75 0,36 0,33 0,612 0,18 0,16 0,79

Total body length (TBL), hind femur length (F3L), hind tibia length (T3L), length of tegmina (TegL), mid-dorsal pronotum length (PL), pronotum height (PH), and the length from the front to the end of tegmina (FTegL); n = number of individuals; F = female; M = male; ND= no data. Measurements are in mm.

for constructive criticism of the manuscript. AT, ERDC, FM and DAM are very grateful to the con-tinuous support of Consejo Nacional de Investig-aciones Científicas y Técnicas (CONICET) Insti-tuto de Biología Subtropical-Universidad Nacio-nal de Misiones. AT and ERDC are very grateful to CEDIT (Comité Ejecutivo de Desarrollo e Inno-vación Tecnológica-Misiones) for postgraduate scholarship. AT and ERDC are PhD candidates at Universidad Nacional de Córdoba, Argentina.