Globorotalia menardii is a perforate foraminiferan, about 1 millimetre (0.04 in) in size. It is interesting because it is a single-celled animal large enough to be seen with a naked eye. It has lived since the Paleocene.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0