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Previous issue date: 2013-02-28 / The Araneidae Clerck, 1757 has 3029 species in 168 genera. They are common in nature, weaving orbicular bidimensional webs on trees and bushes and, apparently, have nocturnal habits. Spiders of Eustala Simon, 1895 occur throughout all American continent and it seems to be the most speciose Neotropical Araneidae genus. The genus contains about 90 species, 16 of which have been described from Brazil. The male is characterized by the palpus with only one patellar macroseta; conic, whitish hanging down posteriorly median apophysis and the terminal apophysis is a sclerotinized extension, resting on a transparent, baloon-like, subterminal apophysis. The females are characterized by the epigynum with ringed scape pointed anteriorly. The most common pattern color on the abdomen dorsum is a folium. However, this could vary from specimen to specimen, being more or less pigmented. Although frequently collected, species of this genus are poorly known, at present, there are just a few studies on the genus from South America. Thus this study aims to contribute to the knowledge of the Brazilian species of Eustala, through diagnosis and illustrations of species from Southern Brazil, giving continuity to the work initiated about the genus on Rio Grande do Sul state. In order to carry out this study, Eustala material from several arachnological collections was analyzed. Illustrations were made with the aid of camera lucida coupled to the stereoscopic microscope. The left male palpus was illustrated on mesal and ventral views; the epigynum was illustrated on ventral, posterior and lateral views. In current study Eustala ulecebrosa (Keyserling, 1892), from Rio Grande do Sul and E. mourei Mello-Leit?o, 1947, from Paran? are illustrated and redescribed. Eight new species from Southern Brazil are described: E. guarani sp. nov., from Paran?; E. catarina sp. nov., from Santa Catarina and E. ericae sp. nov., E. cidae sp. nov., E. lisei sp. nov., E. cuia sp. nov. and E. farroupilha sp. nov, all based on males and females and E. eldorado sp. nov., based only on males, from Rio Grande do Sul. Eustala albiventer (Keyserling, 1884), E. taquara (Keyserling, 1892), E. minuscula (Keyserling, 1892), E. itapocuensis Strand, 1916, E. photographica Mello-Leit?o, 1944, E. levii and E. palmares, Poeta, Marques & Buckup, 2010 present new distribution records from Brazil and E. perfida Mello-Leit?o, 1947 has a first record in Uruguay. / A fam?lia Araneidae Clerck, 1757 agrega 3029 esp?cies em 168 g?neros. Aranhas comuns na natureza, tecem teias orbiculares bidimensionais na vegeta??o arbustiva e arb?rea e, aparentemente, t?m h?bitos noturnos. Eustala Simon, 1895 ocorre em todo o continente Americano e parece ser o g?nero Neotropical de Araneidae com maior riqueza de esp?cies. O g?nero cont?m cerca de 90 esp?cies, das quais 16 s?o descritas do Brasil. O macho caracteriza-se pelo palpo com ?nica macrocerda patelar, ap?fise m?dia c?nica e esbranqui?ada, voltada posteriormente e pela ap?fise terminal que ? um prolongamento esclerotinizado sobre a ap?fise subterminal, em forma de bal?o transparente. As f?meas se caracterizam pelo ep?gino com escapo dirigido anteriormente, podendo ser liso ou anelado. O padr?o de colorido frequente no dorso do abd?men ? o f?lio, no entanto, muitos esp?cimes variam na colora??o, podendo ser mais ou menos pigmentados. Apesar de frequentemente colecionadas as esp?cies desse g?nero s?o pouco conhecidas, visto que s?o escassos os trabalhos taxon?micos do g?nero para a Am?rica do Sul. Assim, este estudo visa contribuir para o conhecimento das esp?cies brasileiras de Eustala, atrav?s da diagnose e ilustra??o das esp?cies dos estados da regi?o Sul do Brasil, dando continuidade ao trabalho iniciado sobre o g?nero no estado do Rio Grande do Sul. Para a execu??o deste projeto, o material de Eustala depositado nas cole??es aracnol?gicas das regi?es Sudeste e Sul do Brasil foram examinados. As ilustra??es foram realizadas com o aux?lio de c?mara-clara acoplada ao microsc?pio estereosc?pio. O palpo esquerdo foi ilustrado nas vistas ventral e mesial e o ep?gino nas vistas ventral, posterior e lateral. No presente trabalho s?o redescritas Eustala ulecebrosa (Keyserling, 1892), do Rio Grande do Sul e E. mourei Mello-Leit?o, 1947, do Paran?. Oito novas esp?cies s?o descritas do Sul do Brasil: E. guarani sp. nov., do Paran?; E. catarina sp. nov., de Santa Catarina e E. ericae sp. nov., E. cidae sp. nov., E. lisei sp. nov., E. cuia sp. nov. e E. farroupilha sp. nov., todas baseadas em machos e f?meas, e E. eldorado sp. nov., baseada em exemplar macho, do Rio Grande do Sul. As esp?cies Eustala albiventer (Keyserling, 1884), E. taquara (Keyserling, 1892), E. minuscula (Keyserling, 1892), E. itapocuensis Strand, 1916, E. photographica Mello-Leit?o, 1944, E. levii e E. palmares, Poeta, Marques & Buckup, 2010 apresentam novos registros de ocorr?ncia no Brasil e E. perfida Mello-Leit?o, 1947, tem primeiro registro para o Uruguai.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/251 |
| Date | 28 February 2013 |
| Creators | Poeta, Maria Rita Muniz |
| Contributors | Lise, Arno Antonio |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Zoologia, PUCRS, BR, Faculdade de Bioci?ncias |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | Portuguese |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da PUC_RS, instname:Pontifícia Universidade Católica do Rio Grande do Sul, instacron:PUC_RS |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 2008925231902741151, 500, 600, 36528317262667714 |
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