Abstract
THE members of certain pairs of foraminiferal genera (Nummulites and Operculinoides, Assilina and Operculina, etc.) with flat spiral tests are distinguished from each other only by the rates (or angles) of opening of their spires. It therefore seems anomalous that no ruling exists as a guide in separating forms after this manner; for although the right allocation is often obvious, there are intermediate forms which might, at present, be as legitimately referred to one genus as to the other, in each of these pairs.
Similar content being viewed by others
Article PDF
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
DAVIES, L. Classification of Spiral Foraminifera. Nature 155, 81 (1945). https://doi.org/10.1038/155081b0
Issue Date:
DOI: https://doi.org/10.1038/155081b0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.