Palaeontology of decabrachiate Cephalopoda - an ultrastructural approach to their morphogeny and phylogeny

十腕足类头足类古生物学——形态发生和系统发育的超微结构方法

• 批准号: 89822787
• 负责人: Dr. Dirk Fuchs
• 金额: --
• 依托单位: Staatssammlung für Paläontologie und Geologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/89822787?language=en
• 关键词: Palaeontology; decabrachiate; Cephalopoda; ultrastructural; approach

Until today, neither neontological nor palaeontological approaches have been able to clarify the origin and the phylogeny of the decabrachiate Coleoidea. This problem is mainly due to a comparatively poor fossil record. However, new (not yet studied) shells of key taxa such as Naefia, Groenlandibelus, and Conoteuthis have recently appeared from the Late Cretaceous of Japan and Canada. Their original (unaltered) shells provide an unique possibility to get new insights into the still unclear shell construction as well as the enigmatic origin of the decabrachiate gladius. It is therefore the goal of the present project to study the shell ultrastructure of Naefia, Groenlandibelus, and Conoteuthis with SEM, to compare it with other pre-Cenozoic, Cenozoic, and Modern decabrachians, as well as with belemnoid coleoids. Thus, a convincing and applicable model of the coleoid shell construction shall be established. The results will be integrated in a combined cladistic analysis consisting of morphological and molecular data.

直到今天，无论是新生物学还是古生物学的方法都不能澄清十臂类鞘翅目的起源和发育。这个问题主要是由于相对较差的化石记录。然而，新的（尚未研究的）贝壳的关键类群，如Naefia，Groenlandibelus，和Conoteuthis最近出现在晚白垩世的日本和加拿大。它们原始的（未改变的）外壳提供了一种独特的可能性，可以对仍然不清楚的外壳结构以及十臂剑的神秘起源有新的了解。因此，本项目的目标是用扫描电镜研究Naefia，Groenlandibelus和Conoteuthis的外壳超微结构，将其与其他前新生代，新生代和现代十臂虫以及belemnoid coleoids进行比较。因此，应建立一个令人信服的和适用的模型的coleoid壳结构。结果将整合在一个组合的分支分析，包括形态和分子数据。

项目成果

The First Diplobelid Coleoid from the Late Cretaceous (Turonian) of Hokkaido (Japan)

来自北海道（日本）晚白垩世（土伦纪）的第一个二倍体鞘甲虫

• DOI: 10.2517/1342-8144-14.3.169
• 发表时间: 2010