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| Barbosa,Amilcar Brum; Santos,Sonia Barbosa dos. |
| We conducted a study on shell morphology variation among three populations of Happiella cf. insularis (Boëttger, 1889) inhabiting different areas (Jararaca, Caxadaço, and Parnaioca trails) at Vila Dois Rios, Ilha Grande, Angra dos Reis, state of Rio de Janeiro, Brazil. Linear and angular measurements, shell indices representing shell shape, and whorl counts were obtained from images drawn using a stereomicroscope coupled with a camera lucida. The statistical analysis based on ANOVA (followed by Bonferroni's test), Pearson's correlation matrix, and discriminant analysis enabled discrimination among the populations studied. The variable that most contributed to discriminate among groups was shell height. Mean shell height was greatest for specimens collected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conchology; Discriminant analysis; Ecology; Morphometry; Threatened biome. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000300004 |
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| Santos,Sonia Barbosa dos; Monteiro,Daniele Pedrosa. |
| A survey of the Ilha Grande land snails was carried out in order to compare the diversity and similarity among two regions of secondary Atlantic Rain Forest. The diversity was estimated using the richness and the equitatibility; the alpha diversity was calculated using the Simpson index (γ). The Sörensen and Jaccard indexes were used to calculate the similarity. A quantitative survey of two 600 m² area, one in each studied region, recorded 336 individuals snails distributed in 23 species and 13 families. The region with more altered secondary forest showed higher richness (17) and diversity (γ = 3,6) than the region more preserved (richness = 14; γ = 2,78), but, the same equitatibility (0,20). The similarity was medium by Jaccard index (IJ = 0,52) and low... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Terrestrial gastropods; Diversity; Ecology; Rio de Janeiro; Brazil. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000500014 |
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| Santos,Sonia Barbosa dos. |
| A study on the morphology of the muscular and reproductive systems of Anisancylus obliquus (Broderip & Sowerby, 1832) based on specimens from Chile is presented. Differences are observed in the number of folicules of the ovotestis and prostata when comparing them with specimens from Brazil (chilean specimens: ovotestis = 28 to 32; prostata = 3 to 5; brazilian specimens: ovotestis = 20 to 21; prostata = 6 to 8). In the muscular system, the right aductor muscle scar is often longer than in brazilian specimens. The general morphology of muscular and reproductive systems is similar to that observed to Uncancylus concentricus (d'Orbigny, 1835) and Gundlachia dutrae Santos, 1994 (V-shaped adhesive area; single right anterior muscle with elongated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Basommatophora; Ancylidae; Anisancylus obliquus; Morphology; Chile. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000400010 |
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| Miyahira,Igor Christo; Santos,Sonia Barbosa dos; Mansur,Maria Cristina Dreher. |
| Abstract 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diplodon; Rhipidodonta; Hyriidae; Bivalvia; Freshwater bivalve. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000400601 |
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| Santos,Sonia Barbosa dos; Miyahira,Igor Christo; Lacerda,Luiz Eduardo Macedo de. |
| Small populations of Melanoides tuberculatus (Müller, 1774) and Biomphalaria tenagophila (d´Orbigny, 1835), were found at Vila do Abraão, being the first record of these species to Ilha Grande, Angra dos Reis, Rio de Janeiro. They were probably introduced after 2004, perhaps following release from aquaria. The possible spread of these species to other freshwater habitats in the island, their effects on native snails and links with public health are discussed. The record of M. tuberculatus appears to be the first for a Brazilian insular area. The recent introduction of these species offers a remarkable opportunity to monitor introduced species and to understand the invasion process in an insular stream in southeastern Brazil. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological invasion; New records; Freshwater snails; Mollusca; Southeastern Brazil. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000300037 |
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| Miyahira,Igor Christo; Carneiro,Jéssica Beck; Gonçalves,Isabela Cristina Brito; Lacerda,Luiz Eduardo Macedo de; Oliveira,Jaqueline Lopes de; Vasconcelos,Mariana Castro de; Santos,Sonia Barbosa dos. |
| Abstract The Guandu River Basin is extremely important to state of Rio de Janeiro, as a water supplier of several municipalities. However, the malacological knowledge and environmental status is not well known to this basin. The aim of this paper is to present an inventory of freshwater mollusks, as well as an environmental assessment through a Rapid Assessment Protocol, of ten sampling sites at Guandu River basin in six municipalities (Piraí, Paracambi, Japeri, Seropédica, Queimados and Nova Iguaçu). Thirteen species of molusks were found, eight native (Pomacea maculata, Biomphalaria tenagophila, Gundlachia ticaga, Gundlachia radiata, Omalonyx matheroni, Diplodon ellipticus, Anodontites trapesialis and Eupera bahiensis) and five exotics (Melanoides... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gastropoda; Bivalvia; Mollusca; Exotic species; RAP. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000300305 |
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