Skip to main content

Free Content Sea Level Change in Mid-Pleistocene Time and Effects on Japanese Ostracode Faunas

Download Article:
 Download
(PDF 1,010.5 kb)
 
The ostracode Sinocytheridea impressa existed in Osaka Bay, southwestern Japan, for an interval of only 0.12 My or more from pre-0.44 Ma to 0.32 Ma. This is in striking contrast to that the modem representative of this form still dominates shallow waters along mainland China. Also almost all of the ostracode species associated with Sin. impressa in Osaka Bay are still widely found in shallow waters around the Japanese Islands. The disappearance of Sin. impressa from Osaka Bay can be attributed to the extensive Spirillina transgression (0.30 to 0.35 Ma) and the preceding long period of regression. Noteworthy in relation to the above is the development of Japanese shallow-water-inhabiting ostracode assemblages of late Cenozoic age: Bicornucythere bisanensis apparently first occurred in late Pliocene time, representing a pioneering taxon, and was followed by Cytheromorpha acupunctata which appeared at least by the earlier half of the Pleistocene. Afterward, Spinileberis quadriaculeata, Pistocythereis bradyi and P. bradyformis appeared to form a more diversified shallow-water inhabiting assemblage in association with Sin. impressa which disappeared shortly thereafter. After this disappearance, Sp. quadriaculeata dominated most of the habitat previously co-occupied with Sin. impressa, and became the predominant element of shallow-water ostracode assemblages.

13 References.

No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: 01 July 1990

More about this publication?
  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more