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Diversity and Evolution of Semionotid Fishes

半节鱼的多样性和进化

基本信息

批准号：
19350687
负责人：
Dr. Adriana López-Arbarello
金额：
--
依托单位：
Sektion Paläontologie und Geobiologie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2005
资助国家：
德国
起止时间：
2004-12-31 至 2012-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/19350687?language=en
关键词：
Diversity Evolution Semionotid Fishes

项目摘要

The Neopterygians are the most important group of bony fishes, with their Recent species numbers greatly exceeding that of all other vertebrate groups. However, their early history is still poorly understood, and the phylogenetic relationships among basal neopterygians, and thus the origin of teleosts, remain enigmatic. One of the most important and controversial groups of basal neopterygians are the semionotids. Although semionotids are among the most common basal neopterygians in Mesozoic sediments, and members of the group were among the first fossil fishes to be described, even their alpha taxonomy and their phylogenetic relationships have not been resolved so far. Furthermore, the phylogenetic position of semionotids within neopterygians is far from clear. The objectives of the current project are thus to establish a phylogenetic framework to attain a better understanding of semionotid evolution and diversity, and to analyse their phylogenetic position within neopterygians. In a three-step approach, first the taxonomy of the most important genera of semionotids will be established, then these will be put in a phylogenetic context, and finally, building on the two previous phases, the position of semionotids within neopterygians will be analysed. The project will lead to a much better understanding of Mesozoic neopterygian diversity and evolution, and character evolution in basal neopterygians in general.

新翅目是最重要的硬骨鱼类群，其最近的物种数量远远超过所有其他脊椎动物类群。然而，它们的早期历史仍然鲜为人知，基生新翼手目动物之间的系统发育关系，以及硬骨鱼的起源，仍然是个谜。新翼目中最重要和最有争议的类群之一是半翅目。虽然半翅目目是中生代沉积物中最常见的底层新翅目动物之一，该类群的成员也是最早被描述的化石鱼类之一，但即使是它们的阿尔法分类和它们的系统发育关系到目前为止也没有得到解决。此外，半翅目昆虫在新翅目动物中的系统发育地位还远不清楚。因此，本项目的目标是建立一个系统发育框架，以更好地了解半胱氨酸的进化和多样性，并分析它们在新翼目动物中的系统发育地位。在一个分三步走的方法中，首先将建立半翅目中最重要的属的分类，然后将这些属置于系统发育的背景中，最后，在前两个阶段的基础上，将分析半翅目在新翅目中的位置。该项目将使人们更好地了解中生代新翅目的多样性和演化，以及基本新翅目的特征演化。