Ultrastructural Description of the Family Metacystidae (Prostomatida, Ciliophora, Protista) and a Phylogenetic Analysis of the Prostomate Ciliates

Metacystidae 科（Prostomatida、Ciliophora、Protista）的超微结构描述和原口纤毛虫的系统发育分析

• 批准号: 9305925
• 负责人: Diana Lipscomb
• 金额: $ 11万
• 依托单位: George Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-01 至 1998-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9305925&HistoricalAwards=false
• 关键词: Ultrastructural; Description; Family; Metacystidae; Prostomatida

WPC 2 B V P Z Courier 10cpi ? x x x , k x 6 X @ 8 ; X @ HP Laserjet (25-in-one, Network) HPLASEII.PRS x @ , t 0 OpX @ 2 2 @ Z cpi 3| x Sj x 6 X @ 8 ; X @ HP DeskJet 500 HPDES500.PRS x @ x X , , 0 FX @ 2 , F P #| x 9305925 Lipscomb During the past two decades many ultrastructural; descriptions of ciliate genera provided new information that inspired reviews and revisions of ciliate systematics. However, there have been only a few publications on the ultrastructural morphology of ciliates in the order Prostomatida, and no work at all on the suborder Prostomatina. Because these ciliates have been proposed to be among the most primitive ciliates, a thorough morphological and taxonomic analysis of them is necessary before a stable classification of the phylum Ciliophora can be achieved. The primary objective of this proposal is to extend the taxonomic scope of the PI's previous studies on the ciliates to include the prostomate family Metacystidae Kahl 1926 by focussing on an ultrastructural description of all the genera in the family, a description of the morphogenesis of a species of the genus Metacystis , and a cladistic phylogenetic analysis of the family's relationship to other prostomial ciliates. The cladistic analysis will allow testing of hypotheses about the supposedly primitive evolutionary position of prostomate ciliates. The broader significance of the proposed investigation is that understanding the diversity and phylogeny of ciliate groups will provide insight into basic evolutionary principles acting on both the single eukaryotic cell and on microbial organisms. In analyzing the complex ultrastructural features o f these ciliates, problems and limitations of various methods for ordering multistate characters will be explored. Details of this methodological exploration should be of broad value to systematists working with different groups of organisms and confronting problems with multistate character ordering. %%% Ciliate protozoa play an important role in temporate costal wetlands as predators on bacteria, algae, other protozoa and small invertabrates in the decomposer food chain. But the relationships of most of these ciliates are poorly understood. This project will utilize detailed ultrastructural analysis to address questions of relationships of the family Metacystidae, a group considered to be very basal and therefore critical in understanding relationships of these important protozoa.

WPC 2 B V P Z 10cpi ? x x x， K x 6 X @ 8 ; X @ HP Laserjet（25合一，网络） HPLASEII.PRS X @ , t 0 OpX @ 2 2 @ Z 消费物价指数3| X Sj x 6 X @ 8 ; X @ HP DeskJet 500 HPDES500.PRS X @ x X，，0 FX @ 2 , F P #|X 小行星9305925 在过去的二十年里，许多纤毛虫属的超微结构描述提供了新的信息，启发了纤毛虫系统学的审查和修订。 然而，目前关于前口目纤毛虫超微结构形态的研究还很少，而前口亚目纤毛虫的研究更是空白。 由于这些纤毛虫被认为是最原始的纤毛虫之一，因此在对纤毛虫门进行稳定的分类之前，有必要对它们进行彻底的形态学和分类学分析。 本提案的主要目的是通过对该科所有属的超微结构描述、对该属一个种的形态发生的描述，将PI先前对纤毛虫的研究的分类范围扩展到包括前口科后囊虫科（Metacystidae Kahl 1926）。 后囊藻属 并对该科与其他口前纤毛虫的亲缘关系进行了分支系统学分析。 支序分析将允许测试的假设假定原始的prostomate纤毛虫的进化地位。 拟议的调查的更广泛的意义是，了解的多样性和纤毛虫群体的进化将提供洞察到基本的进化原则，既对单个真核细胞和微生物有机体。 在分析这些纤毛虫复杂的超微结构特征时，将探讨多种状态特征排序方法的问题和局限性。 这种方法论探索的细节应该是广泛的价值，系统学家与不同群体的有机体和面临的问题与多态字符排序。%%% 纤毛虫原生动物在滨海湿地中作为分解者食物链中细菌、藻类等原生动物和小型无脊椎动物的捕食者，发挥着重要作用。 但这些纤毛虫的关系大多知之甚少。 该项目将利用详细的超微结构分析，以解决家庭Metacystidae，一组被认为是非常基础的关系，因此在了解这些重要的原生动物的问题。