Caracterização taxonômica e morfométrica de espécies de Medusozoa (Cnidaria) do sul da América: uma análise comparada de materiais do Brasil e da Argentina / Taxonomy and morphometry of South American medusozoan (Cnidaria) species: a compared analysis of Brazilian and Argentinean populations

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

We performed morphological comparisons between different populations of some species from the Brazilian and Argentinean coast. Our goal was to investigate the existence of morphometrical structure among these populations and the influence of putative barriers, such as the La Plata River. The analyses were based on different sources of data, such as light microscopy, scanning electron microscopy, general histology and cnidome. The statistical analyses were principal component analysis (PCA), Anova and Tukey HSD tests. We concluded that: (a) populations assigned to P. ralphi and P. crocea are indistinct from each other and, based on literature data, we adopted the binomen Pinauay crocea ; (b) the body size of the medusae of Olindias sambaquiensis and the dimensions of their nematocysts are directly related; (c) the results have shown no definite geographical structure of the populations and therefore the populations assigned to the three species are indistinct in the studied area.

ASSUNTO(S)

scyphozoa atlântico scyphozoa atlantic distribuição hydrozoa taxonomia taxonomy distribution hydrozoa

ACESSO AO ARTIGO

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