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The protocerebrum and its sensory organs in maxillopodan crustaceans: testing the basal phylogenetic relationships within Tetraconata/Pancrustacea

颌足类甲壳类动物的原大脑及其感觉器官：测试四甲类/全甲壳类的基本系统发育关系

基本信息

批准号：
285807604
负责人：
Professor Dr. Stefan Richter
金额：
--
依托单位：
Lehrstuhl für Allgemeine und Spezielle Zoologie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2015
资助国家：
德国
起止时间：
2014-12-31 至 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/285807604?language=en
关键词：
protocerebrum its sensory organs maxillopodan

项目摘要

The protocerebrum is the anteriormost part of the crustacean brain. It receives input from major sensory organs such as the nauplius eye and compound eyes as well as from the enigmatic frontal filament organs. The evolutionary origin of the protocerebrum, in crustaceans and arthropods in general, is under debate and the focus of ongoing research. Regrettably, only very few details are known from maxillopodan crustaceans such as fish lice (Branchiura), barnacles (Cirripedia), copepods, ostracodes and interstitial mystacocarids. These groups, however, play a crucial role in understanding the evolution of Tetraconata/Pancrustacea. Our project will provide new data on the protocerebrum and its sensory organs in various maxillopodans using state of the art techniques such as immunohistochemistry, volume electron microscopy and x-ray microcomputer tomography. The goal of the proposed project is to understand the neuroarchitecture of the protocerebrum and the protocerebral sense organs and to contribute morphological characters which will lead to a better understanding of the evolutionary morphology (sensu Richter & Wirkner 2014) of maxillopodan crustaceans and crustaceans in general. We will investigate (1) which components of a protocerebral central complex are present in the various maxillopodan taxa, (2) the neuroarchitecture of the two optic lobes, testing their homology to those in branchiopods and other Tetraconata, (3) the ultrastructure of the compound eyes, testing the presence of primary pigment cells outside hexapods, (4) the ultrastructure of the nauplius eye, testing the homology status of the tapetum layer, and (5) the innervation and ultrastructure of the enigmatic frontal filament organs, providing evidence or counter-evidence for their homology throughout crustaceans.

原大脑是甲壳类动物大脑的最前部。它接受来自主要感觉器官的输入，如鹦鹉眼和复眼，以及神秘的额叶丝器官。在甲壳类动物和节肢动物中，一般来说，原大脑的进化起源是有争议的，也是目前研究的重点。遗憾的是，我们对颌足类甲壳类动物，如鱼虱类（鳃目）、藤壶类（鳃目）、桡足类、介形虫类和间质密壳类的细节了解甚少。然而，这些类群在理解Tetraconata/ panrustacea的进化中起着至关重要的作用。我们的项目将利用最先进的技术，如免疫组织化学、体积电子显微镜和x射线微机断层扫描，提供各种颌足动物的原大脑及其感觉器官的新数据。拟议项目的目标是了解原大脑和原大脑感觉器官的神经结构，并贡献形态学特征，这将有助于更好地理解颌足类甲壳类动物和一般甲壳类动物的进化形态学（sensu Richter & Wirkner 2014）。我们将研究(1)不同颌足动物类群中存在的原大脑中枢复合物的哪些成分，(2)两个视叶的神经结构，测试它们与鳃足动物和其他四足动物的同源性，(3)复眼的超微结构，测试六足动物外原始色素细胞的存在，(4)无足动物眼的超微结构，测试绒毡层的同源性。(5)神秘额丝器官的神经支配和超微结构，为其在甲壳类动物中的同源性提供证据或反证据。