Maria Cristina Dreher Mansur - Academia.edu (original) (raw)

Papers by Maria Cristina Dreher Mansur

Research paper thumbnail of Moluscos Bivalves Da Localidade De São Marcos, Bacia Do Médio Rio Uruguai, Uruguaiana, Brasil

Revista Biotemas, 2007

1Museu de Ciências Naturais, Pontifícia Universidade Católica do Rio Grande do Sul, Campus Urugua... more 1Museu de Ciências Naturais, Pontifícia Universidade Católica do Rio Grande do Sul, Campus Uruguaiana, BR 472, Km 07, CEP 97500-970, Uruguaiana – RS, Brasil 2Laboratório de Malacologia e Aqüicultura do Museu de Ciências e Tecnologia da Pontifícia Universidade Católica do ...

Research paper thumbnail of Colonization and Spread of Limnoperna fortunei in South America

Limnoperna Fortunei, 2015

The invasion of the exotic bivalve Limnoperna fortunei (Dunker 1857) in South America started wit... more The invasion of the exotic bivalve Limnoperna fortunei (Dunker 1857) in South America started with its introduction, presumably with ballast water from transoceanic ships trading with Southeast Asia, in the Rio de la Plata estuary (Argentina) around 1990. From there, it spread swiftly to cover most of the Rio de la Plata basin, as well as the basins of Guaiba and Tramandai (Brazil), Patos–Mirim (Brazil–Uruguay), and Mar Chiquita (central Argentina). These smaller watersheds were most probably colonized as a result of secondary human-mediated introductions from waterbodies of the Rio de la Plata basin. L. fortunei is now present in five South American countries: Argentina, Bolivia, Brazil, Paraguay, and Uruguay. Expansion was much faster along navigable waterways, especially the Parana River and its tributaries (around 250 km/year), and slower elsewhere (Upper Paraguay and Uruguay rivers and their tributaries). Over 20 years after its introduction in South America, new waterbodies are still being colonized by L. fortunei (e.g., the first records of the mussel in the Peixoto and Itapeva lakes, Tramandai River system, date from 2013). Mussels have not been recorded in a few rivers of the Rio de la Plata basin where their survival seems to be limited by excessively high suspended solid loads or salinities, or by the fact that they periodically dry out (e.g., the rivers Bermejo, Pilcomayo, and Salado del Norte, in north-central Argentina). South American populations display a relatively high genetic differentiation, confirming that geographic spread is strongly dependent on human activities: vessel and barge traffic is the main vector that helps to disperse the mussel locally through upstream “jumps” of adults attached to ship hulls. Genetic studies also suggest that there have been multiple introductions. By early 2014, L. fortunei had not yet been reported from any of the other major South American watersheds (Amazon, Sao Francisco, Orinoco), but colonization of these basins is probably inevitable. Modeling of potential distribution based on habitat fitness indicates that extensive regions could support L. fortunei, including much of lowland South America, southern Mexico, the southeastern USA, Europe, and Africa.

Research paper thumbnail of Contributors to Volume V

Research paper thumbnail of Evaluation of materials and coatings to control incrustation by Limnoperna fortunei

Biotemas

Experiments aimed at selection of materials and coatings with antifouling properties for Limnoper... more Experiments aimed at selection of materials and coatings with antifouling properties for Limnoperna fortunei were conducted in southern Brazil, in two localities: next to the main stream of the Jacuí River, municipality of Porto Alegre, RS, and the reservoir of the UHE Ibitinga power plant, ...

Research paper thumbnail of Non-native mollusks throughout South America: emergent patterns in an understudied continent

Biological Invasions, 2020

Non-native species have been introduced at escalating rates during the last decades, mainly due t... more Non-native species have been introduced at escalating rates during the last decades, mainly due to the dispersion generated by the increasing trade and transport worldwide. Mollusks, the second largest metazoan phylum in terms of species richness, are no exception to this pattern, but, to date, a comprehensive synthesis of non-native mollusk species (NNMS) in South America was not available. For this purpose, an e-discussion group was formed with malacologists and taxonomists from South America, where we exchanged and analyzed bibliography, databases and information about NNMS, providing expert opinion to this assessment. The first list of non-native mollusk species for South America, considering terrestrial, freshwater and marine environments, includes 86 NNMS distributed in 152 ecoregions (terrestrial, freshwater and marine) of the 189 recognized for the South American continent. Information on their native region, vectors, first record for South America and distribution, are also provided. In the analysis of the distribution of the NNMS and the entry points of each species (e.g., ports, cargo and passenger airports, cities) and status of conservation of the ecoregions, four hot spots were recognized: Subtropical-Atlantic,

Research paper thumbnail of Strombus costatus (Mollusca, Gastropoda) na Ilha do Arvoredo em Santa Catarina, Brasil

Research paper thumbnail of Paxyodon syrmatophorus (MEUSCHEN, 1781) (Mollusca, Bivalvia, Unionoida) in the Curuá-Una reservoir, Santarém, Pará, Brazil

The Curua-Una hydroelectric power plant which dams the river of the same name was the first to be... more The Curua-Una hydroelectric power plant which dams the river of the same name was the first to be constructed in the Amazon Basin. The project of this plant was not based on a study on environmental impact which was not required at the time. Therefore, no survey ...

Research paper thumbnail of Moluscos bivalves do Rio Uraricoera e Rio Branco, Roraima, Brasil

Research paper thumbnail of Lista sistemática de los bivalvia dulciacuícolas vivientes de Uruguay

Resumen es: Se listan las especies y subespecies vivientes de Bivalvia dulciacuicolas registradas... more Resumen es: Se listan las especies y subespecies vivientes de Bivalvia dulciacuicolas registradas para Uruguay (40 nativas mas 3 introducidas). Esta fauna esta comp...

Research paper thumbnail of Radiação ultravioleta como controle da incrustação do mexilhão dourado em tubulações de captação de água para usinas termelétricas

Resumo O invasor mexilhão dourado, Limnoperna fortunei, introduzido em ecossistemas límnicos da A... more Resumo O invasor mexilhão dourado, Limnoperna fortunei, introduzido em ecossistemas límnicos da América do Sul, tem causado impactos ecológicos, tornando-se uma preocupação ambiental. Além de ameaçar à biodiversidade, tornou-se um problema econômico, causam a obstrução dos encanamentos e trocadores de calor junto às estações de tratamento de água e indústrias que utilizam água bruta para resfriamento. Uma alternativa para a solução desses problemas seria a radiação ultravioleta, considerada uma tecnologia não agressora ao meio ambiente, direcionada ao controle das larvas do mexilhão dourado. Experimentos realizados em uma unidade piloto, onde as larvas do mexilhão dourado foram submetidas a doses conhecidas de radiação ultravioleta, sob diferentes vazões da água circulante, com o tempo de exposição e a qualidade da água conhecidos. Os indivíduos e a água para o experimento foram obtidos junto a Usina Termelétrica Charqueadas, Tractebel Energia S/A. Os resultados preliminares demonstraram-se satisfatórios no controle das larvas de mexilhão dourado. Palavras-chave controle, mexilhão dourado, radiação ultravioleta, captação de água, usinas termelétricas.

Research paper thumbnail of New records of Omalonyx matheroni (Pontiez & Michaud, 1835) (Mollusca, Gastropoda, Succineidae) for the São Paulo and Paraná States

Omalonyx matheroni is a succineid gastropod that lives on aquatic macrophytes and on emergent veg... more Omalonyx matheroni is a succineid gastropod that lives on aquatic macrophytes and on emergent vegetation in the wetlands of inner deltas, lakes and dikes. Occurrences of this species were recorded in the municipalities of Ibitinga (SP) and Paranaguá (PR), broadening its ...

Research paper thumbnail of Phylogenetic Assessment of Freshwater Mussels Castalia ambigua and C. inflata at an Ecotone in the Paraguay River Basin, Brazil Shows That Inflated and Compressed Shell Morphotypes Are the Same Species

Diversity

The phylogeny and taxonomy of freshwater mussels of the genus Castalia in South America is compli... more The phylogeny and taxonomy of freshwater mussels of the genus Castalia in South America is complicated by issues of morphological plasticity and limited molecular genetic data. We present field data on the distributions of the nominal Castalia ambigua and C. inflata in the upper Paraguay River basin in Brazil based on original occurrence data at 23 sample sites and on historical records. The upper basin has distinct highland and lowland regions, the latter including the Pantanal wetland, where “C. ambigua” occurs in the highlands and “C. inflata” occurs in both regions. At Baixo Stream in the highlands, we observed individuals with shell morphologies of either C. ambigua or C. inflata, and also individuals with intermediate shell morphology. DNA sequence variation in the upland Baixo Stream and two representative lowland populations were screened. Two mitochondrial and three nuclear genes were sequenced to test hypotheses regarding the number of species-level phylogenetic lineages p...

Research paper thumbnail of Ocorrência de Limnoperna fortunei (Mollusca, Mytilidae), no rio Uruguai, município de Uruguaiana, Fronteira Oeste do Rio Grande do Sul, Pampa Brasileiro

Biotemas, 2013

Submetido em 04/03/2013 Aceito para publicação em 04/06/2013 Resumo O presente trabalho registra ... more Submetido em 04/03/2013 Aceito para publicação em 04/06/2013 Resumo O presente trabalho registra a ocorrência do mexilhão dourado Limnoperna fortunei (Dunker, 1857) em ambiente natural no município de Uruguaiana, Fronteira Oeste do Rio Grande do Sul, Pampa Brasileiro. Os aglomerados da espécie foram detectados, fotografados e coletados na margem esquerda do rio Uruguai, em território brasileiro, em dois locais distintos, sendo o primeiro próximo a Ponte Internacional Getúlio Vargas-Agustín Justo, que faz divisa entre as cidades de Uruguaiana/Brasil e Paso de Los Libres/Argentina e o segundo próximo à foz do arroio Salso, afluente do rio Uruguai. Os animais foram capturados e levados para laboratório onde foram identificados e armazenados.

Research paper thumbnail of Corbiculidae in the Pantanal: history of invasion in southeast and central South America and biometrical data

Amazoniana-limnologia Et Oecologia Regionalis Systemae Fluminis Amazonas, 2002

The chronology of the invasion by Corbicukt of the Central and the eastern part of South America ... more The chronology of the invasion by Corbicukt of the Central and the eastern part of South America is revised based on the líterature and museum collection records. The occurrence af Corhiculu lurgillierti (PHILIPPI, 18441 a¡d Corbicula.flumir¡s¿ (MÚLLER. 1774} are reported for rhe first time for rhe norrhcm parl øf the Pantanal of Mato Crosso, af the upper part of the Paraguay River. a tributary of the large Paraná Basin. Corbículidae were sampled at three dífferent localities, on the banks of the Cuiabá River, near Cuiabá, capital of Mato Crosso State. The highest population density was 192 í/m2. The shef I length of the sarnpled population of Corbícula largillícrti varied between 5.42 and 17.53 mm and Corhi<'ult .lluminea varied belween 14.74 and 27.33 mm. The age for thc sarnpled specimens of C. llumineu was estimated lo be near lhree years and the dale of arrival of the species in the Pantanal is probably 1996 or 97. The relalionship between shell length, heigh, wídth and ...

Research paper thumbnail of Voces en el bosque: El uso de recursos vegetales entre cazadores-recolectores de la zona central de Tierra del Fuego

We studied the different ways of plant use among the Selknam from Tierra del Fuego (Argentina). I... more We studied the different ways of plant use among the Selknam from Tierra del Fuego (Argentina). In this paper we present the results obtained from the study of carbonized and non carbonized wood remains recovered at Ewan site, which was occupied at the beginning of the XXth century to celebrate an initiation ceremony. Results allowed a better understanding of the strategies of plant use in hunter-gatherer societies. The identification of the species used, and the analysis of their principal morphometric characteristics characterize the use of the "Ñire" (Nothofagus antarctica). This species, dominant in the surroundings, was used to build the dwelling as well as for fuel. For both uses, stems with suitable form and size were selected. Archaeobotanical results and their confrontation with the ethnographic data support the importance of vegetable resources within the socioeconomic dynamics of the selknam society. Vegetable resources, beyond their use as food, were important in other aspects, such as technology, hut construction, fuel, and they certainly represented a considerable advantage in the area of the forests of the central zone of Tierra del Fuego.

Research paper thumbnail of Morphology and distribution of the freshwater mussel Diplodon granosus, a rare and poorly understood species

Acta Amazonica

Diplodon granosus was one of the first freshwater mussels to be described for South America. Howe... more Diplodon granosus was one of the first freshwater mussels to be described for South America. However, the status of the species was confusing for a long time, receiving different taxonomic treatments. In this paper, we redescribe the shell, with new data on the soft parts and information on the distribution and conservation of D. granosus, a rarely recorded species. The shell is thin, not inflated; the macrosculpture is composed only by granules that cover the whole shell, not forming bars; the microsculpture comprises short spikes. In the soft parts we highlight the few, weak and irregularly distributed lamellar connections of the outer demibranch and some features of the stomach, such as the distally enlarged minor typhlosole. There are records of D. granosus over a large area of South America, from Guiana to Argentina. However, most of these records are related to other species and the distribution of D. granosus is restricted to the north of South America in the basins of the Am...

Research paper thumbnail of Redescription of Diplodon ellipticus Spix in Wagner, 1827, Diplodon multistriatus (Lea, 1831), and Rhipidodonta garbei (Ihering, 1910) (Bivalvia: Hyriidae) from coastal rivers of eastern and northeastern Brazil

Archiv für Molluskenkunde International Journal of Malacology

Research paper thumbnail of Sponge and mollusk associations in a benthic filter-feeding assemblage in the middle and lower Xingu River, Brazil

Proceedings of the Academy of Natural Sciences of Philadelphia

Research paper thumbnail of Freshwater mussels from South America: state of the art of Unionida, specially Rhipidodontini

Biota Neotropica

Unionida is the most diverse clade of freshwater bivalves. Among the groups occurring in South Am... more Unionida is the most diverse clade of freshwater bivalves. Among the groups occurring in South America, one with the highest number of species is Rhipidodontini (Hyriidae, Unionida, Paleoheterodonta, Bivalvia). However several issues remains on taxonomy and systematic of this group, leading to problems on species identification, description, as also as a limiting factor to other type of studies (e.g., ecology, conservation,…). In this paper is presented a synthesis of available knowledge about Diplodon Spix in Wagner, 1827 and Rhipidodonta Mörch, 1853 in South America, as a first step in order to a better understating of Rhipidodontini. The evaluation of different authors exposes the little agreement between them that resulted in a sort of divergent taxonomical opinions. Some comments on ecology, conservation and habitat preferences were made. This work can also encourage future research on taxonomy, systematic, ecology and conservation of freshwater mussels in South America.

Research paper thumbnail of Morphological assessment of Rheodreissena (Bivalvia: Veneroida: Dreissenidae) with an updated diagnosis of the genus, descriptions of two new species, redescription of R. lopesi, and the first account of larval brooding in New World dreissenids

Proceedings of the Academy of Natural Sciences of Philadelphia

Research paper thumbnail of Moluscos Bivalves Da Localidade De São Marcos, Bacia Do Médio Rio Uruguai, Uruguaiana, Brasil

Revista Biotemas, 2007

1Museu de Ciências Naturais, Pontifícia Universidade Católica do Rio Grande do Sul, Campus Urugua... more 1Museu de Ciências Naturais, Pontifícia Universidade Católica do Rio Grande do Sul, Campus Uruguaiana, BR 472, Km 07, CEP 97500-970, Uruguaiana – RS, Brasil 2Laboratório de Malacologia e Aqüicultura do Museu de Ciências e Tecnologia da Pontifícia Universidade Católica do ...

Research paper thumbnail of Colonization and Spread of Limnoperna fortunei in South America

Limnoperna Fortunei, 2015

The invasion of the exotic bivalve Limnoperna fortunei (Dunker 1857) in South America started wit... more The invasion of the exotic bivalve Limnoperna fortunei (Dunker 1857) in South America started with its introduction, presumably with ballast water from transoceanic ships trading with Southeast Asia, in the Rio de la Plata estuary (Argentina) around 1990. From there, it spread swiftly to cover most of the Rio de la Plata basin, as well as the basins of Guaiba and Tramandai (Brazil), Patos–Mirim (Brazil–Uruguay), and Mar Chiquita (central Argentina). These smaller watersheds were most probably colonized as a result of secondary human-mediated introductions from waterbodies of the Rio de la Plata basin. L. fortunei is now present in five South American countries: Argentina, Bolivia, Brazil, Paraguay, and Uruguay. Expansion was much faster along navigable waterways, especially the Parana River and its tributaries (around 250 km/year), and slower elsewhere (Upper Paraguay and Uruguay rivers and their tributaries). Over 20 years after its introduction in South America, new waterbodies are still being colonized by L. fortunei (e.g., the first records of the mussel in the Peixoto and Itapeva lakes, Tramandai River system, date from 2013). Mussels have not been recorded in a few rivers of the Rio de la Plata basin where their survival seems to be limited by excessively high suspended solid loads or salinities, or by the fact that they periodically dry out (e.g., the rivers Bermejo, Pilcomayo, and Salado del Norte, in north-central Argentina). South American populations display a relatively high genetic differentiation, confirming that geographic spread is strongly dependent on human activities: vessel and barge traffic is the main vector that helps to disperse the mussel locally through upstream “jumps” of adults attached to ship hulls. Genetic studies also suggest that there have been multiple introductions. By early 2014, L. fortunei had not yet been reported from any of the other major South American watersheds (Amazon, Sao Francisco, Orinoco), but colonization of these basins is probably inevitable. Modeling of potential distribution based on habitat fitness indicates that extensive regions could support L. fortunei, including much of lowland South America, southern Mexico, the southeastern USA, Europe, and Africa.

Research paper thumbnail of Contributors to Volume V

Research paper thumbnail of Evaluation of materials and coatings to control incrustation by Limnoperna fortunei

Biotemas

Experiments aimed at selection of materials and coatings with antifouling properties for Limnoper... more Experiments aimed at selection of materials and coatings with antifouling properties for Limnoperna fortunei were conducted in southern Brazil, in two localities: next to the main stream of the Jacuí River, municipality of Porto Alegre, RS, and the reservoir of the UHE Ibitinga power plant, ...

Research paper thumbnail of Non-native mollusks throughout South America: emergent patterns in an understudied continent

Biological Invasions, 2020

Non-native species have been introduced at escalating rates during the last decades, mainly due t... more Non-native species have been introduced at escalating rates during the last decades, mainly due to the dispersion generated by the increasing trade and transport worldwide. Mollusks, the second largest metazoan phylum in terms of species richness, are no exception to this pattern, but, to date, a comprehensive synthesis of non-native mollusk species (NNMS) in South America was not available. For this purpose, an e-discussion group was formed with malacologists and taxonomists from South America, where we exchanged and analyzed bibliography, databases and information about NNMS, providing expert opinion to this assessment. The first list of non-native mollusk species for South America, considering terrestrial, freshwater and marine environments, includes 86 NNMS distributed in 152 ecoregions (terrestrial, freshwater and marine) of the 189 recognized for the South American continent. Information on their native region, vectors, first record for South America and distribution, are also provided. In the analysis of the distribution of the NNMS and the entry points of each species (e.g., ports, cargo and passenger airports, cities) and status of conservation of the ecoregions, four hot spots were recognized: Subtropical-Atlantic,

Research paper thumbnail of Strombus costatus (Mollusca, Gastropoda) na Ilha do Arvoredo em Santa Catarina, Brasil

Research paper thumbnail of Paxyodon syrmatophorus (MEUSCHEN, 1781) (Mollusca, Bivalvia, Unionoida) in the Curuá-Una reservoir, Santarém, Pará, Brazil

The Curua-Una hydroelectric power plant which dams the river of the same name was the first to be... more The Curua-Una hydroelectric power plant which dams the river of the same name was the first to be constructed in the Amazon Basin. The project of this plant was not based on a study on environmental impact which was not required at the time. Therefore, no survey ...

Research paper thumbnail of Moluscos bivalves do Rio Uraricoera e Rio Branco, Roraima, Brasil

Research paper thumbnail of Lista sistemática de los bivalvia dulciacuícolas vivientes de Uruguay

Resumen es: Se listan las especies y subespecies vivientes de Bivalvia dulciacuicolas registradas... more Resumen es: Se listan las especies y subespecies vivientes de Bivalvia dulciacuicolas registradas para Uruguay (40 nativas mas 3 introducidas). Esta fauna esta comp...

Research paper thumbnail of Radiação ultravioleta como controle da incrustação do mexilhão dourado em tubulações de captação de água para usinas termelétricas

Resumo O invasor mexilhão dourado, Limnoperna fortunei, introduzido em ecossistemas límnicos da A... more Resumo O invasor mexilhão dourado, Limnoperna fortunei, introduzido em ecossistemas límnicos da América do Sul, tem causado impactos ecológicos, tornando-se uma preocupação ambiental. Além de ameaçar à biodiversidade, tornou-se um problema econômico, causam a obstrução dos encanamentos e trocadores de calor junto às estações de tratamento de água e indústrias que utilizam água bruta para resfriamento. Uma alternativa para a solução desses problemas seria a radiação ultravioleta, considerada uma tecnologia não agressora ao meio ambiente, direcionada ao controle das larvas do mexilhão dourado. Experimentos realizados em uma unidade piloto, onde as larvas do mexilhão dourado foram submetidas a doses conhecidas de radiação ultravioleta, sob diferentes vazões da água circulante, com o tempo de exposição e a qualidade da água conhecidos. Os indivíduos e a água para o experimento foram obtidos junto a Usina Termelétrica Charqueadas, Tractebel Energia S/A. Os resultados preliminares demonstraram-se satisfatórios no controle das larvas de mexilhão dourado. Palavras-chave controle, mexilhão dourado, radiação ultravioleta, captação de água, usinas termelétricas.

Research paper thumbnail of New records of Omalonyx matheroni (Pontiez & Michaud, 1835) (Mollusca, Gastropoda, Succineidae) for the São Paulo and Paraná States

Omalonyx matheroni is a succineid gastropod that lives on aquatic macrophytes and on emergent veg... more Omalonyx matheroni is a succineid gastropod that lives on aquatic macrophytes and on emergent vegetation in the wetlands of inner deltas, lakes and dikes. Occurrences of this species were recorded in the municipalities of Ibitinga (SP) and Paranaguá (PR), broadening its ...

Research paper thumbnail of Phylogenetic Assessment of Freshwater Mussels Castalia ambigua and C. inflata at an Ecotone in the Paraguay River Basin, Brazil Shows That Inflated and Compressed Shell Morphotypes Are the Same Species

Diversity

The phylogeny and taxonomy of freshwater mussels of the genus Castalia in South America is compli... more The phylogeny and taxonomy of freshwater mussels of the genus Castalia in South America is complicated by issues of morphological plasticity and limited molecular genetic data. We present field data on the distributions of the nominal Castalia ambigua and C. inflata in the upper Paraguay River basin in Brazil based on original occurrence data at 23 sample sites and on historical records. The upper basin has distinct highland and lowland regions, the latter including the Pantanal wetland, where “C. ambigua” occurs in the highlands and “C. inflata” occurs in both regions. At Baixo Stream in the highlands, we observed individuals with shell morphologies of either C. ambigua or C. inflata, and also individuals with intermediate shell morphology. DNA sequence variation in the upland Baixo Stream and two representative lowland populations were screened. Two mitochondrial and three nuclear genes were sequenced to test hypotheses regarding the number of species-level phylogenetic lineages p...

Research paper thumbnail of Ocorrência de Limnoperna fortunei (Mollusca, Mytilidae), no rio Uruguai, município de Uruguaiana, Fronteira Oeste do Rio Grande do Sul, Pampa Brasileiro

Biotemas, 2013

Submetido em 04/03/2013 Aceito para publicação em 04/06/2013 Resumo O presente trabalho registra ... more Submetido em 04/03/2013 Aceito para publicação em 04/06/2013 Resumo O presente trabalho registra a ocorrência do mexilhão dourado Limnoperna fortunei (Dunker, 1857) em ambiente natural no município de Uruguaiana, Fronteira Oeste do Rio Grande do Sul, Pampa Brasileiro. Os aglomerados da espécie foram detectados, fotografados e coletados na margem esquerda do rio Uruguai, em território brasileiro, em dois locais distintos, sendo o primeiro próximo a Ponte Internacional Getúlio Vargas-Agustín Justo, que faz divisa entre as cidades de Uruguaiana/Brasil e Paso de Los Libres/Argentina e o segundo próximo à foz do arroio Salso, afluente do rio Uruguai. Os animais foram capturados e levados para laboratório onde foram identificados e armazenados.

Research paper thumbnail of Corbiculidae in the Pantanal: history of invasion in southeast and central South America and biometrical data

Amazoniana-limnologia Et Oecologia Regionalis Systemae Fluminis Amazonas, 2002

The chronology of the invasion by Corbicukt of the Central and the eastern part of South America ... more The chronology of the invasion by Corbicukt of the Central and the eastern part of South America is revised based on the líterature and museum collection records. The occurrence af Corhiculu lurgillierti (PHILIPPI, 18441 a¡d Corbicula.flumir¡s¿ (MÚLLER. 1774} are reported for rhe first time for rhe norrhcm parl øf the Pantanal of Mato Crosso, af the upper part of the Paraguay River. a tributary of the large Paraná Basin. Corbículidae were sampled at three dífferent localities, on the banks of the Cuiabá River, near Cuiabá, capital of Mato Crosso State. The highest population density was 192 í/m2. The shef I length of the sarnpled population of Corbícula largillícrti varied between 5.42 and 17.53 mm and Corhi<'ult .lluminea varied belween 14.74 and 27.33 mm. The age for thc sarnpled specimens of C. llumineu was estimated lo be near lhree years and the dale of arrival of the species in the Pantanal is probably 1996 or 97. The relalionship between shell length, heigh, wídth and ...

Research paper thumbnail of Voces en el bosque: El uso de recursos vegetales entre cazadores-recolectores de la zona central de Tierra del Fuego

We studied the different ways of plant use among the Selknam from Tierra del Fuego (Argentina). I... more We studied the different ways of plant use among the Selknam from Tierra del Fuego (Argentina). In this paper we present the results obtained from the study of carbonized and non carbonized wood remains recovered at Ewan site, which was occupied at the beginning of the XXth century to celebrate an initiation ceremony. Results allowed a better understanding of the strategies of plant use in hunter-gatherer societies. The identification of the species used, and the analysis of their principal morphometric characteristics characterize the use of the "Ñire" (Nothofagus antarctica). This species, dominant in the surroundings, was used to build the dwelling as well as for fuel. For both uses, stems with suitable form and size were selected. Archaeobotanical results and their confrontation with the ethnographic data support the importance of vegetable resources within the socioeconomic dynamics of the selknam society. Vegetable resources, beyond their use as food, were important in other aspects, such as technology, hut construction, fuel, and they certainly represented a considerable advantage in the area of the forests of the central zone of Tierra del Fuego.

Research paper thumbnail of Morphology and distribution of the freshwater mussel Diplodon granosus, a rare and poorly understood species

Acta Amazonica

Diplodon granosus was one of the first freshwater mussels to be described for South America. Howe... more Diplodon granosus was one of the first freshwater mussels to be described for South America. However, the status of the species was confusing for a long time, receiving different taxonomic treatments. In this paper, we redescribe the shell, with new data on the soft parts and information on the distribution and conservation of D. granosus, a rarely recorded species. The shell is thin, not inflated; the macrosculpture is composed only by granules that cover the whole shell, not forming bars; the microsculpture comprises short spikes. In the soft parts we highlight the few, weak and irregularly distributed lamellar connections of the outer demibranch and some features of the stomach, such as the distally enlarged minor typhlosole. There are records of D. granosus over a large area of South America, from Guiana to Argentina. However, most of these records are related to other species and the distribution of D. granosus is restricted to the north of South America in the basins of the Am...

Research paper thumbnail of Redescription of Diplodon ellipticus Spix in Wagner, 1827, Diplodon multistriatus (Lea, 1831), and Rhipidodonta garbei (Ihering, 1910) (Bivalvia: Hyriidae) from coastal rivers of eastern and northeastern Brazil

Archiv für Molluskenkunde International Journal of Malacology

Research paper thumbnail of Sponge and mollusk associations in a benthic filter-feeding assemblage in the middle and lower Xingu River, Brazil

Proceedings of the Academy of Natural Sciences of Philadelphia

Research paper thumbnail of Freshwater mussels from South America: state of the art of Unionida, specially Rhipidodontini

Biota Neotropica

Unionida is the most diverse clade of freshwater bivalves. Among the groups occurring in South Am... more Unionida is the most diverse clade of freshwater bivalves. Among the groups occurring in South America, one with the highest number of species is Rhipidodontini (Hyriidae, Unionida, Paleoheterodonta, Bivalvia). However several issues remains on taxonomy and systematic of this group, leading to problems on species identification, description, as also as a limiting factor to other type of studies (e.g., ecology, conservation,…). In this paper is presented a synthesis of available knowledge about Diplodon Spix in Wagner, 1827 and Rhipidodonta Mörch, 1853 in South America, as a first step in order to a better understating of Rhipidodontini. The evaluation of different authors exposes the little agreement between them that resulted in a sort of divergent taxonomical opinions. Some comments on ecology, conservation and habitat preferences were made. This work can also encourage future research on taxonomy, systematic, ecology and conservation of freshwater mussels in South America.

Research paper thumbnail of Morphological assessment of Rheodreissena (Bivalvia: Veneroida: Dreissenidae) with an updated diagnosis of the genus, descriptions of two new species, redescription of R. lopesi, and the first account of larval brooding in New World dreissenids

Proceedings of the Academy of Natural Sciences of Philadelphia