Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-12-02T22:34:22.436Z Has data issue: false hasContentIssue false
  • English
  • Français

The occurrence of hinge reversal in Buntonia beninensis Reyment (Ostracoda), Paleocene, Nigeria

Published online by Cambridge University Press:  14 July 2015

Edward A. Okosun
Edward A. Okosun*
Affiliation:
Geological Survey Department, P.M.B. 2007, Kaduna, Nigeria
Get access Rights & Permissions [Opens in a new window]

Extract

A microfossil study of two boreholes, Araromi and Gbekebo (Geological Survey of Nigeria borehole numbers 1131 and 1132) (Figure 1), revealed the occurrence of Buntonia beninensis Reyment (1960, 1963) in the late Paleocene interval. This species was found to have forms with normal overlap and hinge element and forms with a reversal of these morphological features. In the former, the left valve is larger than the right, which bears the projecting terminal hinge element, whereas, in the latter, the larger valve is the right valve with the smaller left valve bearing the projecting terminal hinge element.

Type
Paleontological Notes
Information
Journal of Paleontology , Volume 62 , Issue 4 , July 1988 , pp. 654 - 656
Copyright
Copyright © The Paleontological Society 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Alexander, C. I., and Alexander, C. W. 1933. Reversal of valve size and hinge structure in a species of the genus Cytheridea. The American Midland Naturalist, 14(3):280–283.CrossRefGoogle Scholar
Al-Abdul-Razzaq, S. 1980. New Eocytheropteron species with reversed valve structure. Micropaleontology, 26:444–448.CrossRefGoogle Scholar
Reyment, R. A. 1960. Studies on Nigerian Upper Cretaceous and lower Tertiary Ostracoda. Pt. 1: Senonian and Maastrichtian Ostracoda. Stockholm Contributions in Geology, Vol. 7, 239 p.Google Scholar
Reyment, R. A. 1963. Studies on Nigeria Upper Cretaceous and lower Tertiary Ostracoda. Pt. II: Danian, Peleocene and Eocene Ostracoda. Stockholm Contributions in Geology, Vol. 10, 286 p.Google Scholar