College of Life Sciences, Hebei University, Baoding, 071002, China.
Ecology Group, University of Technology Kaiserslautern, Kaiserslautern, 67663, Germany.
J Eukaryot Microbiol. 2019 Sep;66(5):694-706. doi: 10.1111/jeu.12714. Epub 2019 Feb 8.
A new hypotrichous ciliate, Schmidtiella ultrahalophila gen. nov., spec. nov., was isolated from a solar saltern on the island of Sal, Cape Verde. The possession of only one short dorsal kinety clearly distinguishes S. ultrahalophila from other known hypotrichous genera and species. Further diagnostic characters include: a flexible and slender body, an average size of 85 × 15 μm in vivo; a bipartite adoral zone with two hypertrophied frontal adoral membranelles and nine to twelve ventral adoral membranelles; three frontal, one parabuccal, two frontoventral, two or three postoral ventral, and two or three frontoterminal cirri; and marginal cirral rows variable in number, usually one on each side. Ontogenetic data indicate the following: the frontal-ventral cirri originate from six or five anlagen; the proter inherits the parental adoral zone; the frontal and ventral cirri originate from five or six anlagen; and the marginal cirral rows and the dorsal kinety tend to originate intrakinetally. Additional marginal rows are rarely derived from de novo anlagen. Based on its morphology, morphogenesis and its SSU rRNA phylogenetic placement, the new species should be assigned to the order Sporadotrichida Fauré-Fremiet, 1961. Due to low taxon sampling, however, its exact position in this order remains enigmatic.
一种新的旋口目纤毛虫，超嗜盐新旋口虫属（Schmidtiella ultrahalophila），种名 nova，是从佛得角萨尔岛的一个太阳能盐场中分离出来的。只有一条短的背腹联纤带这一特征，可将 S. ultrahalophila 与其他已知的旋口目属和种明显区分开来。其他的鉴别特征还包括：身体柔软细长，活体大小平均为 85×15μm；二分的口前区，有两个特化的前口前膜和 9-12 个腹口前膜；三个前腹棘，一个旁口棘，两个前腹侧棘，两个或三个后腹腹侧棘，以及两个或三个额腹前棘；和数目不定的缘棘列，通常每侧各有一个。发生学数据表明：前腹棘由 6 或 5 个原基发育而来；前器来自亲代的口前区；前棘和腹棘由 5 或 6 个原基发育而来；缘棘列和背联纤带倾向于从联纤带内部发生。额外的缘棘列很少由新的原基衍生而来。根据其形态、形态发生和 18S rRNA 系统发育位置，该新种应归入旋口目（Sporadotrichida）Fauré-Fremiet，1961。然而，由于分类单元采样不足，其在该目中的确切位置仍然是个谜。
