Integrative taxonomy – Parthenogenetic radiations and ‘species’ delimitation using multimodal data

综合分类学 – 使用多模式数据进行孤雌辐射和“物种”界定

• 批准号: 434797100
• 负责人: Professor Dr. Michael Heethoff
• 金额: --
• 依托单位: Arbeitsgruppe Ecological Networks
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/434797100?language=en
• 关键词: Integrative; taxonomy; Parthenogenetic; radiations; species

Most of the existing animal species are described based on their morphology (morphospecies). Such morphospecies, however, often consist of several genetically separated populations (cryptic species complexes, CSCs). Integrative taxonomy aims at the delineation and naming of distinct species from such CSCs by using and combining more than one kind of data (multimodal data; e.g., morphological, chemical, molecular). CSCs are assumed to be especially common in phylogenetic groups with a comparably simple morphology (e.g., many micro-arthropods) or groups where the morphology is under strong selection. The reproductive mode (sexual vs. parthenogenetic) also influences rates of character evolution/diversity and speciation. This project has two main objectives – (1) How can multimodal data (molecular, morphological, chemical) help to detect and describe distinct species in CSCs of micro-arthropods? (2) How does the reproductive mode (sexual vs. parthenogenetic) influence character diversification and the amount of CSCs in oribatid mites?With a high number of co-existing sexual and (many ancient) parthenogenetic species, multiple events of parthenogenetic radiations, and a demonstrated high amount of CSCs, oribatid mites (especially the Crotoniidae) represent an ideal model system to approach these general questions. We will generate datasets from 18 different presumable CSCs of sexual and parthenogenetic oribatid mite morphospecies from the Crotoniidae (>1000 individuals). Molecular barcoding data (mitochondrial cox1, nuclear ribosomal D3 region), chemical profiles of complex exocrine oil gland secretions (hydrocarbons, aromatics and terpenes), and morphological characters (mostly qualitative and quantitative chaetotaxy) will be included for each specimen.

大多数现存的动物物种都是根据它们的形态(形态种)来描述的。然而，这种形态种通常由几个遗传分离的种群(神秘物种复合体，CSCs)组成。综合分类学旨在通过使用和组合一种以上的数据(多模式数据；例如，形态、化学、分子)来描述和命名这些CSC中的不同物种。CSCs被认为在形态相对简单的系统发育群(例如，许多微型节肢动物)或其形态处于强烈选择之下的群中特别常见。生殖方式(有性生殖与孤雌生殖)也影响特征进化/多样性和物种形成的速度。该项目有两个主要目标-(1)多模式数据(分子、形态、化学)如何帮助检测和描述微型节肢动物CSCs中的不同物种？(2)繁殖模式(有性生殖和孤雌生殖)如何影响甲螨的特征多样性和CSCs的数量？由于有大量的有性生殖和(许多古老的)孤雌生殖物种共存，多事件的孤雌生殖辐射，以及大量的CSCs被证明是一个理想的模型系统来解决这些一般问题。我们将从18个不同的推定的有性和孤雌生殖甲螨形态种的CSC中生成数据集(&gt；1000个个体)。每个标本的分子条形码数据(线粒体cox1，核糖体D3区)、复杂外分泌物的化学特征(碳氢化合物、芳香烃和萜类)以及形态特征(主要是定性和定量的层序关系)都将包括在内。