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Daponte, Maria C.; Castro, Roberto J.; Esnal, Graciela B.. |
Until 1973, when Van Soest revised Thalia Blumenbach, 1798, this genus comprised only two species: Thalia democratica (Forsskål, 1775) and Thalia longicauda (Quoy & Gaimard, 1824). The former showed great variability, which led Van Soest to distinguish five species: T. rhomboides, T. cicar, T. democratica, T. orientalis, and T. sibogae. Some authors have ignored this revision considering the observed differences of infraspecific level. In the present work new material is studied analysing variables not previously considered, such as the development of blastogenic stolons in the solitary zooids and the location of the tunnel opening through which the bud blocks are liberated. These characters previously permitted a separation of closely related species... |
Tipo: Article / Letter to the editor |
Palavras-chave: Tunicata; Salpidae; Thalia; Thalia democratica group. |
Ano: 1996 |
URL: http://www.repository.naturalis.nl/record/503970 |
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Rocha,Rosana M. da; Kremer,Laura P.. |
Exotic (introduced) species are a growing problem in ports worldwide and comprise the most important impacts in marine ecosystems. Periodic monitoring to detect introduced species is extremely important for effective population control. Here we sampled ascidian species near the port of Paranaguá for a taxonomic study of this fauna to attempt to detect introduced species. Larval stages in ascidians are short-lived, and dispersal is restricted to small distances, and so ascidians are very good bioindicators for exotic introductions due to ship transport. Four locations were sampled within Paranaguá Bay (Ilha das Cobras, Pier Tenenge, Ilha do Mel and Ilha da Galheta) and one location outside of the bay (Parque dos Meros). Information for the nearby fauna and... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascidiacea; Tunicata; Introduced species; Bioinvasion. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000400052 |
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