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| Batista, Frederico; Ben-hamadou, Radhouan; Fonseca, Vera; Taris, Nicolas; Ruano, Francisco; Reis-henriques, Maria; Boudry, Pierre. |
| The taxonomic status of the cupped oysters Crassostrea angulata and C. gigas has received considerable attention in the last decades. Based on larval shell morphology, experimental hybridization, allozymes and nuclear DNA studies several authors have considered these two taxa as being synonymous. However, mitochondrial data showed clear genetic differences between the two taxa. In addition, microsatellite-based studies and cytogenetic studies have also provided evidence that supports their differentiation. Considerable differences have also been observed at the phenotypic level in terms of growth rate and ecophysiological parameters. In the present study, C. angulata from Sado estuary (Portugal) and C. gigas from Seudre estuary (France) were collected and... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Crassostrea angulata; Hybridization; Shell pigmentation; Shell morphology. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-3904.pdf |
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| Groenenberg, D.S.J.; Wesselingh, F.P.; Rajagopal, S.; Jansen, J.M.; Bos, M.M.; Velde, G. van der; Gittenberger, E.; Hoeksema, B.W.; Raad, H.; Hummel, H.. |
| Late Quaternary (Eemian) deposits of the Netherlands contain shells that resemble those of living Mytilus galloprovincialis. Similar broad-shelled mytilids also occur in estuaries of the southwestern Netherlands together with slender individuals typical of M. edulis. We sampled living mussels along a depth gradient in the Oosterschelde to a) investigate whether a relation exists between shell shape and depth, b) test if the broadshelled specimens might represent M. galloprovincialis (or a hybrid with M. edulis) and c) assess by inference if the Quaternary specimens might be attributed to M. galloprovincialis as well. In order to do so, we compared genetic (length polymorphism of Me 15/16, COIII sequences and AFLPs) and shellmorphological characteristics... |
| Tipo: Article / Letter to the editor |
Palavras-chave: AFLP; COIII; Me 15/16; Mytilus; Shell morphology; The Netherlands; 42.73. |
| Ano: 2011 |
URL: http://www.repository.naturalis.nl/record/376595 |
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| Lacerda,Luiz Eduardo M.; Miyahira,Igor C.; Santos,Sonia B.. |
| The freshwater snail Gundlachia ticaga (Marcus & Marcus, 1962) is widely distributed in Brazil, but its morphology has been poorly studied. We compared the shell morphology of samples from four sites (Vila do Abraão, Vila de Provetá, Parnaioca and Praia do Sul) in Ilha Grande (Angra dos Reis, state of Rio de Janeiro) in order to evaluate differences within and among four populations. We used nine morphometric characters representing shell size and shape. To analyze shell morphology we considered aperture shape, sculpture of teleoconch, apex carving and position. The resulting dataset was correlated by Pearson´s linear correlation and shell differences among populations were tested using ANOVA and Discriminant Function Analysis. The results showed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phenotypic plasticity; Freshwater snails; Mollusca; Shell morphology. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000300007 |
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