Reconstruction of hatching sizes in the extinct animal, belemnites

2016 Fiscal Year Final Research Report

• Project/Area Number: 26800264
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Stratigraphy/Paleontology
• Research Institution: Yokohama National University
• Principal Investigator: WANI RYOJI 横浜国立大学, 大学院環境情報研究院, 准教授 (70508580)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 頭足類 / 孵化サイズ / 繁殖戦略 / ベレムナイト

Outline of Final Research Achievements

Based on modern and fossil specimens of cephalopods, their hatchling sizes was analyzed. In modern coleoids, there are abrupt changes of septal distances between succeeding septa, which are supposed to be related to the hatching events. In Jurassic belemnites, there is no abrupt changes of septal distances between succeeding septa, which suggests that these belemnites hatched with no chamber.

Free Research Field

層位・古生物学