Zur Evolution der Larvenformen der Bivalvia (Mollusca): Ein high-tech-mikromorphologischer Vergleich

通过在上述项目中应用广泛的方法，产生了关于各种软体动物群体的比较个体发生学数据，这些数据应扩大到关于双壳原鳃类。剩下的主要议题是澄清的地位pericalymma幼虫的原鳃类。将活采集各分类群（主要是珠母贝科）的代表，并繁殖其幼虫。将通过几种高科技形态学（光学和电子显微镜，计算机辅助3D重建，荧光标记）方法研究各个阶段。目标是：（1）用荧光染料结合共聚焦激光扫描显微镜（CLSM）显示不同类型幼虫的部分肌纤维和神经发生。提供（3）原轮和幼虫（4）感觉器官和（5）排泄器官的SEM/TEM数据，并将其与其他软体动物类别的同源结构进行比较。(6)总结资料以提供双壳类及其他种类的演化演化史。主要目标有直接的后果，双壳类动物的生殖和一个新的框架的起源和进化历史的门软体动物。

The comparative-ontogenetic data on various molluscan groups, which have been generated by application of a broad methodology within the foregoing projects, should be widened concerning the protobranch Bivalvia. The remaining main topic is the clarification of the status of the pericalymma larva of the Protobranchia. Representatives of the respective taxa (mainly Nuculidae) will be collected alive and their larva will be bred. The various stages will be investigated by several high-tech morphological (light- and electron microscopy, computer-aided 3D-reconstruction, fluorescence labeling) methods. Objectives are: (1) Show the myo- und (2) in parts also neurogenesis of the different larval types by fluorescent dyes coupled with Confocal-Laser- Scanning-Microscopy (CLSM). Provide SEM/TEM-data on the (3) prototroch and on larval (4) sensory and (5) excretory organs and compare them with homologous structures in other molluscan classes. (6) Summarize the data to provide an evolutionary phylogeny (evo-devo) of Bivalvia and beyond. The main objectives have direct consequences for the bivalvian phylogeny and for a new framework about the origin and evolutionary history of the phylum Mollusca.