JM Journal of Micropalaeontology JM J. Micropalaeontol. 2041-4978 GSL Publishing Göttingen, Germany 10.1144/jm.4.1.169 Index of taxa 01 03 1985 4 1 11 Copyright: © 1985 1985 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://jm.copernicus.org/articles/4/11/1985/jm-4-11-1985.html The full text article is available as a PDF file from https://jm.copernicus.org/articles/4/11/1985/jm-4-11-1985.pdf