Journal cover Journal topic
Journal of Micropalaeontology An open-access journal of The Micropalaeontological Society
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.179 IF 1.179
  • IF 5-year value: 1.107 IF 5-year
    1.107
  • CiteScore value: 2.6 CiteScore
    2.6
  • SNIP value: 0.601 SNIP 0.601
  • IPP value: 1.23 IPP 1.23
  • SJR value: 0.491 SJR 0.491
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 27 Scimago H
    index 27
  • h5-index value: 10 h5-index 10
Volume 6, issue 1
J. Micropalaeontol., 6, 9, 1987
https://doi.org/10.1144/jm.6.1.77
© Author(s) 1987. This work is distributed under
the Creative Commons Attribution 4.0 License.
J. Micropalaeontol., 6, 9, 1987
https://doi.org/10.1144/jm.6.1.77
© Author(s) 1987. This work is distributed under
the Creative Commons Attribution 4.0 License.

  01 May 1987

01 May 1987

The British Silurian ostracod genus Octonaria Jones, 1887: its revision and phylogeny

Lee E. Petersen1 and Robert F. Lundin2 Lee E. Petersen and Robert F. Lundin
  • 1Anadarko Petroleum Corporation, 7600 East Orchard Road, Englewood, Colorado, U.S.A. 80111
  • 2Department of Geology, Arizona State University, Tempe, Arizona, U.S.A. 85287

Abstract. The ostracod genus Octonaria Jones, 1887 has been grossly misunderstood because of misleading illustrations of the type-species, O. octoformis Jones, 1887. The type species is considered to be the only member of the genus presently known. All other of the nearly four dozen species and varieties which have been placed in the genus are considered to be junior synonyms of O. octoformis or members of other genera. Octonaria is presently known only from late Wenlock to early Ludlow strata of the Welsh Borderland area. It was probably derived from a “Bairdiocypris” gotlandica – like ancestor and is ancestral to the Late Silurian – Early Devonian North American genus Thlipsorothella Lundin & Petersen, 1974.

Publications Copernicus
Download
Citation