Paleoecological study on the adaptation and evolution of deep-water sessile fauna

2017 Fiscal Year Final Research Report

• Project/Area Number: 26287131
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Stratigraphy/Paleontology
• Research Institution: Nagoya University
• Principal Investigator: Oji Tatsuo 名古屋大学, 博物館, 教授 (50160487)
• Co-Investigator(Kenkyū-buntansha): ジェンキンズ ロバート 金沢大学, 自然システム学系, 助教 (10451824)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 棘皮動物 / ウミユリ / ウミシダ / 捕食圧 / 海洋動物 / 化石化過程 / タフォノミー

Outline of Final Research Achievements

Following paleoecological studies have been conducted about crinoids (Echinodermata), the representative deep-sea sessile animals. By examining morphology and carbon isotope of the skeletons, Cretaceous stalked crinoids from South Dakota and Hokkaido are concluded as a member of cold seep environment. By an experimental taphonomy and observation of postures of fossil stalked crinoids, a new method can be found about detecting existence and absence of musculature in the arms. About the predation pressure of comatulid crinoids received from their predators, it is successfully found that quantitative data could be obtained and compared by measuring the frequency of regenerated arms of these crinoids form northwestern Pacific, northeastern Pacific and north Atlantic.

Free Research Field

古生物学、海洋動物学