Phylogenetic placement of the Cyrtolophosididae Stokes, 1888 (Ciliophora; Colpodea) and neotypification of Aristerostoma marinum Kahl, 1931
Phylogenetic placement of the Cyrtolophosididae Stokes, 1888 (Ciliophora; Colpodea) and neotypification of Aristerostoma marinum Kahl, 1931
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DOI：
10.1099/ijs.0.000935-0
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发表时间：
2009-01-01
影响因子：
2.8
通讯作者：
Stoeck, Thorsten
中科院分区：
文献类型：
--
作者：
Dunthorn, Micah;Eppinger, Marion;Stoeck, Thorsten
纤毛虫科Cyrtolophosididae Stokes，1888包含从形态学和分子角度都知之甚少的物种。为了进一步了解这个科，重新描述了一个种，Aristerostoma marinum Kahl，1931。我们群体中的细胞具有15 × 8 μ m的平均体内大小。有6行体动子，以及6个属于稀疏纤毛体动子的背动子。口器由二分的口旁膜和四个口旁细胞器组成。pH和O-2的最佳生态耐受性匹配的环境中，标本采集，但不同的盐度和温度。为了进一步检验该科的系统发育位置，增加了分类单元采样，小亚基rDNA的三个形态种的特征：A。marinum、Aristostoma sp. ATCC 50986和Pseudoacetolophopsis alpestris。不受约束和约束的分子分析支持的非单系的订单Cyrtolophosidida。该科从其目的其余部分中分离出来。从以前的环境研究的单倍型也被放置在系统发育的背景下，在类Colpodea。
The ciliate family Cyrtolophosididae Stokes, 1888 contains species that are poorly known from both the morphological and molecular perspectives. To further our understanding of this family, one species, Aristerostoma marinum Kahl, 1931, was redescribed. Cells in our population had a mean in vivo size of 15x8 mu m. There were six rows of somatic kineties, as well as six dorsal kinetids belonging to sparsely ciliated somatic kineties. The oral apparatus comprised a bipartite paroral membrane and four adoral organelles. The optimal ecological tolerances for pH and O-2 matched those of the environment in which the specimens were collected, but were different for salinity and temperature. To further test the phylogenetic placement of the family Cyrtolophosididae with increased taxon sampling, the small subunit rDNA of three morphospecies was characterized: A. marinum, Aristerostoma sp. ATCC 50986 and Pseudocyrtolophopsis alpestris. Unconstrained and constrained molecular analyses supported the non-monophyly of the order Cyrtolophosidida. The family Cyrtolophosididae fell out separately from the rest of its order. Haplotypes from previous environmental studies were also placed in a phylogenetic context within the class Colpodea.