Morphologic and molecular diversity of the foraminiferal genus Globocassidulina in Admiralty Bay, King George Island
Morphologic and molecular diversity of the foraminiferal genus Globocassidulina in Admiralty Bay, King George Island
复制标题
乔治王岛金钟湾有孔虫属 Globocassidulina 的形态和分子多样性
DOI：
10.1017/s0954102010000106
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发表时间：
2010
影响因子：
1.6
通讯作者：
J. Pawłowski
中科院分区：
文献类型：
--
作者：
W. Majewski;J. Pawłowski
摘要在南设得兰群岛国王乔治岛的金钟湾表层沉积物中，发现了四种不同形态的活球蛛。SSU和ITS rDNA的分子生物学分析表明，除200 m水深以下的微小型可能代表G.亚球形。G.生物群显示出双孔或分枝孔，不同的测试大小和形状以及细胞质颜色，代表了个体发育不同阶段的种群。然而，大G.来自同一地点的biora很难理解。看来G. biora是唯一一个在整个南极洲都有代表性的大型浅水Globoadulina，而G. crassa是麦哲伦地区的典型。
Abstract Four distinctive morphological types can be found among living Globocassidulina in surface sediments of Admiralty Bay (King George Island, South Shetland Islands). The molecular analysis of the SSU and ITS rDNA indicates that they are monospecific and belong to Globocassidulina biora, except for minute forms from deeper than 200 m water depth which probably represent G. subglobosa. The morphological types of G. biora that show doubled or branched apertures, varied test size and shape as well as colour of cytoplasm, represent populations at different stages of ontogenetic development. However, the variability among large G. biora from the same locations is difficult to comprehend. It seems probable that G. biora is the only recent, large, shallow water Globocassidulina represented throughout the Antarctica, while G. crassa is typical for the Magellan region.