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Phylogeny, functional morphology, and palaeoecology of basal Hippuritida (Bivalvia) from the Tithonian (Upper Jurassic) of central Europe.

中欧提通纪（上侏罗统）的基底蹄足纲（双壳纲）的系统发育、功能形态和古生态学。

基本信息

批准号：
200940973
负责人：
Dr. Simon Schneider
金额：
--
依托单位：
CASP
依托单位国家：
德国
项目类别：
Research Fellowships
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2011-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/200940973?language=en
关键词：
Phylogeny functional morphology palaeoecology basal

项目摘要

Diceratidae and Epidiceratidae are highly significant bivalves with regard to carbonate sedimentology and phylogeny. During the Late Jurassic, they form a widespread biofacies, and they are the basal representatives of the order Hippuritida. The limestones of Ernstbrunn (Lower Austria) have yielded one of the largest and best-preserved diceratid faunas of Tithonian age, and the proposed project adresses open questions on diceratid palaeoecology, functional morphology, and phylogeny by exploiting quantitative data from these samples and supplementary material from the tramberk limestones (CZ). In a first step, intraspecific variability of diceratids will be assessed by combining qualitative character analyses with classic morphometry, Fourier shape analysis, landmark analysis, and three-dimensional-shell modelling, in order to develop a modern comprehensive species concept. Subsequently, diceratids and other basal Hippuritida from Ernstbrunn and tramberk will be thoroughly revised using modern terminology and the previously developed species concepts. Based on the results, the early phylogeny of the Hippuritida will then be adressed applying a cladistic analysis. Supplementary data will be derived from material from other localities and time slices to distinguish temporal from spatial aspects, and to detect palaeobiogeographic patterns. Digital three-dimensional modelling of the rudist body and shell, using data from internal moulds and well-preserved shells, will be used to infer shell and body volumes, as well as soft anatomy, and the relationship of these parameters to the adaptive process of shell coiling and cementation. Finally, a survey of the co-occurring biota and characterisation of the microfacies will be carried out to identify and address the particular diceratid life habits and palaeoecology at Ernstbrunn and tramberk, as well as the environmental parameters that generally make a habitat suitable for colonisation by Diceratidae.

在碳酸盐沉积学和系统发育方面，双角虫科和附角虫科是非常重要的双壳类。在晚侏罗世，它们形成了广泛分布的生物相，是河马目的基础代表。Ernstbrunn（下奥地利）的石灰石已经产生了最大和保存最完好的Tithonian时代的双角虫动物群之一，该项目通过利用这些样品的定量数据和tramberk石灰石（CZ）的补充材料，解决了关于双角虫古生态学，功能形态学和系统发育的开放性问题。在第一步，我们将结合定性特征分析、经典形态分析、傅立叶形状分析、地标分析和三维壳模型来评估双角亚纲的种内变异性，以建立一个现代的综合物种概念。随后，将使用现代术语和先前发展的物种概念彻底修订来自Ernstbrunn和tramberk的diceratids和其他基础河马目。根据结果，河马的早期系统发育将应用分支分析来解决。补充数据将来自其他地点和时间片的材料，以区分时间和空间方面，并检测古生物地理模式。利用来自内部模具和保存完好的贝壳的数据，ruddist身体和贝壳的数字三维建模将用于推断贝壳和身体的体积，以及软解剖结构，以及这些参数与贝壳卷曲和胶结的自适应过程的关系。最后，将对共存的生物群和微相特征进行调查，以确定和解决在Ernstbrunn和tramberk的特殊的diceratid生活习性和古生态，以及通常使Diceratidae适合殖民的栖息地的环境参数。