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FIGURES 11–24 in A redescription of Rheotanytarsus lamellatus Reiss in all stages (Diptera: Chironomidae) and new records from Argentina
No full textFIGURES 11–24. Immatures of Rheotanytarsus lamellatus Reiss. Pupa: 11—frontal apotome, 12—thorax, 13—thoracic horn, 14—wing nose, 15—abdomen dorsal (spurs of VIII segment in detail), 16—tergite III, 17—sternite III (ventral lateral seta in detail). Larva: 18—antenna, 19—mandible, 20—premandible, 21—frontoclypeal apotome, 22—mentum, 23—simple seta, 24—seta of abdominal segment.Published as part of Tejerina, Eva Gabriela & Paggi, Analía Constancia, 2009, A redescription of Rheotanytarsus lamellatus Reiss in all stages (Diptera: Chironomidae) and new records from Argentina, pp. 31-38 in Zootaxa 2315 on page 34, DOI: 10.5281/zenodo.19201
A redescription of Rheotanytarsus lamellatus Reiss in all stages (Diptera: Chironomidae) and new records from Argentina
Get PDFImmature stages and adult female of Rheotanytarsus lamellatus Reiss are described for the first time, and the male is redescribed, diagnosed and compared with R. meridionalis (Johannsen). Both species are reported for the first time from Argentina. Keys to South American male adults and pupae are given.Fil: Tejerina, Eva Gabriela. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Paggi, Analia Constancia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; Argentin
A new Neotropical species of Oliveiriella Wiedenbrug & Fittkau (Diptera: Chironomidae) from Argentina, with description of all its life stages
Get PDFThe South American genus Oliveiriella is reported for the first time from Argentina. Description and diagnosis of all stages of a new species as well as the larva of O. almeidai are given.Fil: Tejerina, Eva Gabriela. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Paggi, Analia Constancia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; Argentin
Rheotanytarsus
No full textKey to male adults of Rheotanytarsus from South America [emended from Andersen & Kyerematen (2001)] 1. Median volsella with apical plate, reaching apex of superior volsella or shorter; wing length 2 mm. Chile, Argentina (Reiss 1972, fig. 11) .................................................................. Rheotanytarsus globosus Reiss 2. Median volsella with distal setae fused into a rounded plate....................................................................................... 3 - Median volsella with distal setae fused into a distinct petal-like apical plate. Peru (Andersen & Kyerematen 2001, figs 9–12) ...................................................................................................................... Rheotanytarsus pelus (Roback) 3. Superior volsella oval, apically rounded or pointed, with 5 or 6 dorsal setae.............................................................. 4 - Superior volsella subtriangular, with 4 dorsal setae; wing length c. 1.10 mm. Brazil (Andersen & Kyerematen 2001, figs 1–8) ................................................................................. Rheotanytarsus pantanalensis Andersen & Kyerematen 4. Median volsella reaching apex of superior volsella; superior volsella with 5 dorsal setae, apically rounded; wing length c. 1.40 mm; Puerto Rico, Argentina ................................................... Rheotanytarsus meridionalis (Johannsen) - Median volsella never reaching apex of superior volsella; superior volsella with 6 dorsal setae, apically pointed; wing length c. 1.31 mm. Chile, Argentina .................................................................. Rheotanytarsus lamellatus ReissPublished as part of Tejerina, Eva Gabriela & Paggi, Analía Constancia, 2009, A redescription of Rheotanytarsus lamellatus Reiss in all stages (Diptera: Chironomidae) and new records from Argentina, pp. 31-38 in Zootaxa 2315 on page 37, DOI: 10.5281/zenodo.19201
Chironomidae (Diptera) larvae assemblages differ along an altitudinal gradient and temporal periods in a subtropical montane stream in Northwest Argentina
Get PDFThe objective of this study was to analyze the spatial and temporal dynamics of Chironomidae larvae assemblages in a subtropical mountain river basin of northwestern Argentina. We hypothesized that they would respond to (1) environmental changes along the altitudinal gradient in the Yungas forests; (2) environmental changes caused by spates (e. g., increased discharge or sediment transportation). We sampled five sites along an altitudinal gradient of ca. 1,500 m (from 680 to 2,170 m) during low-water and high-water period for 2 years. The Chironomidae larvae assemblages varied along the altitudinal gradient and between sampling periods based on an indicator species analyses and an ordination analyses (NMDS). The best indicator for high altitude sites was "Genus X" followed by Onconeura sp. 2, "Genus 9", "Genus 10", and Rheotanytarsus sp. 2; while Rheotanytarsus lamellatus, Oliveiriella sanjavieri, and Thienemanniella sp. were good indicators for low altitude sites. O. sanjavieri and R. lamellatus were the best indicators for high-water period. The most relevant environmental variables influencing their spatial and temporal distribution were altitude, water temperature, conductivity, and pH. This study is the first to analyze and describe in detail the spatial and temporal distribution of Chironomidae larvae assemblages in northwestern Argentina, and most of the taxa reported here are new records for the region.Fil: Tejerina, Eva Gabriela. Universidad Nacional de Tucuman. Facultad de Cs.naturales e Instituto Miguel Lillo. Instituto de Biodiversidad Neotropical; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaFil: Malizia, Agustina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Instituto de Ecología Regional; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentin
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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