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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/17365
Tipo: Artigo de Periódico
Título: Intracolonial variation in Siderastrea de Blainville, 1830 (Anthozoa, Scleractinia): taxonomy under challenging morphological constraints
Título(s) alternativo(s): Biota Neotropica
Autor(es): Menezes, Natália Matos de
Neves, Elizabeth Gerardo
Barros, Francisco
Kikuchi, Ruy Kenji Papa de
Johnsson, Rodrigo
Autor(es): Menezes, Natália Matos de
Neves, Elizabeth Gerardo
Barros, Francisco
Kikuchi, Ruy Kenji Papa de
Johnsson, Rodrigo
Abstract: The morphology of sessile invertebrates, such as scleractinian corals, can be controlled by environmental and genetic mechanisms and, consequently, it is highly variable. Morphological variation has puzzled taxonomists by posing challenges to species classification within cryptic species complexes. The 'Atlantic Siderastrea Complex' is a suitable example. Because of overlapping diagnostic traits, the morphological interspecific limits of this group remain controversial and often resulted in doubtful synonyms. In addition, the recent identification of the Caribbean S. radians in the Southwestern Atlantic has revealed that intraspecific variation has been equivocally assessed. Traditionally, hierarchical categories of variation have been the criteria used to investigate the patterns of modular organisms as corals. However, despite its taxonomic and ecological implications, the category 'intracolonial' has been largely neglected. To evaluate the influences of intracolonial morphological variation in the identification of Atlantic siderastreids, colonies from Bahia State, northeastern Brazil, were collected and measured. Six characters were selected in S. radians and S. stellata, and the variation in these characters was analyzed with Discriminant Canonical Analysis. The columellar depth and diameter varied consistently within S. stellata and S. radians, but the septal number was the most important for differentiating the two species. The results of the study also represent the first report of S. radians on the northern coast of Bahia.
Palavras-chave: Systematics
Siderastrea radians
Morphological variation
Biogeographic expansion
South Atlantic
País: Brasil
Tipo de Acesso: Acesso Aberto
URI: http://repositorio.ufba.br/ri/handle/ri/17365
Data do documento: 2013
Aparece nas coleções:Artigo Publicado em Periódico (Biologia)

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