Dissertation Research: A Cladistic Analysis of the Actiniarian Family Edwardsiidae and its Relationship to the Zoantharia

论文研究：Actiniarian 家族 Edwardsiidae 的分支分析及其与 Zoantharia 的关系

• 批准号: 9801370
• 负责人: Diana Lipscomb
• 金额: $ 0.91万
• 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: 1998
• 资助国家: 美国
• 起止时间: 1998-07-15 至 2000-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9801370&HistoricalAwards=false
• 关键词: Dissertation; Research; Cladistic; Analysis; Actiniarian

9801370 Lipscomb The Zoantharia (which includes the Actiniaria sea anemones , Scleractinia stony corals , and Corallimorpharia coral-like polyps lacking a stony skeleton ) is characterized by the presence of an eight-rayed, bilaterally symmetric larval form, called the edwardsia larva. In most actiniarians, this larva is a transient stage that develops into an adult with twelve mesenteries and a distinctive basal disc. One family, the Edwardsiidae, gives its name to the larval stage because its adults retain eight mesenteries and lack a basal disc. The similarity between the larval form of other zoantharians and adult edwardsiids has given rise to various hypotheses including the hypothesis that the Edwardsiidae are the basal group or the derived crown group of the Zoantharia. The goals of this research are: (1) to evaluate hypotheses concerning the evolutionary placement of the Edwardsiidae in the Zoantharia using phylogenetic methods. Data for this will come from gross anatomical and histological investigation of adults, studies of developmental morphogenesis, scanning electron microscopy of nematocysts, and transmission electron microscopy of sperm. (2) Because the Edwardsiidae are apparently disappearing from many habitats, it is important for us to develop accurate species and generic characterizations and identification guides. Therefore we will initiate of a revision of the species and genera of Edwardsiidae that will include an analysis of morphological variation within species collected from the same area, lists of synonomy, distribution information, and indentification keys. The Dissertation Improvement Award will allow us to travel to collect specimens and to examine specimens in museum collections in Europe.

9801370 Lipscomb Zoantharia（包括 Actiniaria 海葵、Scleractinia 石珊瑚和缺乏石骨架的 Corallimorpharia 珊瑚状息肉）的特征是存在八条射线、两侧对称的幼虫形式，称为 edwardsia 幼虫。 对于大多数海葵来说，幼虫是一个短暂的阶段，发育成具有十二个肠系膜和独特的基底盘的成虫。 爱德华氏菌科 (Edwardsiidae) 因其幼虫阶段而得名，因为其成虫保留了八个肠系膜且缺乏基底盘。 其他动物的幼虫形式与成年爱德华氏虫之间的相似性引起了各种假设，包括爱德华氏虫科是动物的基部群体或派生的冠群体的假设。 本研究的目标是：（1）使用系统发育方法评估有关爱德华氏虫科在Zoantharia中的进化定位的假设。 这方面的数据将来自对成人的总体解剖学和组织学研究、发育形态发生研究、线虫囊扫描电子显微镜和精子透射电子显微镜。 (2) 由于爱德华氏菌科显然正在从许多栖息地中消失，因此开发准确的物种和属属特征以及识别指南对我们来说非常重要。 因此，我们将开始对爱德华氏菌科的物种和属进行修订，其中包括对从同一地区收集的物种内的形态变异的分析、同名列表、分布信息和识别关键字。论文改进奖将使我们能够前往欧洲收集标本并检查博物馆收藏的标本。