PDF(Pubmed)
Abstract：
Belemnite rostra are very abundant in Mesozoic marine deposits in many regions. Despite this abundance, soft-tissue specimens of belemnites informing about anatomy and proportions of these coleoid cephalopods are extremely rare and limited to a few moderately large genera like Passaloteuthis and Hibolithes. For all other genera, we can make inferences on their body proportions and body as well as mantle length by extrapolating from complete material. We collected data of the proportions of the hard parts of some Jurassic belemnites in order to learn about shared characteristics in their gross anatomy. This knowledge is then applied to the Bajocian genus Megateuthis, which is the largest known belemnite genus worldwide. Our results provide simple ratios that can be used to estimate belemnite body size, where only the rostrum is known.
摘要：
在许多地区的中生代海相矿床中，白板岩非常丰富。尽管如此丰富，告知这些胚状体头足类动物的解剖结构和比例的贝类软组织标本极为罕见，并且仅限于一些中等大的属，例如Passaloteuthis和Hibolithes。对于所有其他属，我们可以通过从完整的材料推断来推断它们的身体比例和身体以及地幔长度。我们收集了一些侏罗纪贝类的坚硬部分比例的数据，以了解其总体解剖结构的共同特征。然后将这些知识应用于Bajocian属Megateutis，这是世界上已知的最大的贝伦石属。我们的结果提供了简单的比率，可用于估计贝伦石体大小，只有讲台是已知的。
