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首页> 外文期刊>Zoological Journal of the Linnean Society >Three new species of deep-sea Gromia (Protista, Rhizaria) from the bathyal and abyssal Weddell Sea, Antarctica
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Three new species of deep-sea Gromia (Protista, Rhizaria) from the bathyal and abyssal Weddell Sea, Antarctica

机译：来自南极海底和深海韦德尔海的三种新的深海格罗米亚物种（Protista，Rhizaria）

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摘要

We describe three new species of the genus Gromia from bathyal and abyssal depths in the Weddell Sea. The new species are characterized by a combination of morphological and molecular criteria. All three species possess a distinct oral capsule and a layer of 'honeycomb membranes', which form the inner part of the organic test wall. Both these features are typical of gromiids. Their identification as gromiids is confirmed by analyses of partial small subunit ribosomal DNA (SSU rDNA) gene sequences. Gromia marmorea sp. nov. is a rounded species with a prominent oral capsule and a characteristically mottled appearance. In Gromia melinus sp. nov., the test surface exhibits a polygonal pattern of ridges, with a layer of clay particles coating the surface between the ridges. Gromia winnetoui sp. nov. represents an elongate morphotype in which the organic test is enclosed within an agglutinated case, a feature previously unknown in gromiids. Phylogenetic analysis using the maximum-likelihood method revealed that all three species form distinct clades, reflecting the morphological differences among Weddell Sea species, as well as between deep-water Southern Ocean Gromia and previously described gromiids.
机译：我们从韦德尔海的深渊和深渊描述了格罗米亚属的三个新物种。新物种的特征是结合了形态学和分子标准。这三个物种均具有独特的口服胶囊和一层“蜂窝膜”，形成了有机测试壁的内部。这两个功能都是典型的gromiid。通过对部分小亚基核糖体DNA（SSU rDNA）基因序列的分析，证实了它们被识别为类固醇。格罗米亚marmorea sp。十一月是圆形的，具有突出的口腔包膜和特征性的斑驳外观。在格罗米亚melinus sp。十一月，测试表面呈现出脊的多边形图案，并且在脊之间的表面上覆盖有一层粘土颗粒。 Gromia winnetoui sp。十一月代表细长的形态型，其中有机测试封闭在凝集的情况下，这是以前在格罗米德人中未知的特征。用最大似然法进行的系统发育分析表明，这三个物种均形成不同的进化枝，反映出韦德尔海物种之间以及深水南部大洋格罗米亚海域与先前描述的格罗米欧类之间的形态差异。

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