World Register of Marine Species (WoRMS)
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2026). World Foraminifera Database. Sigmoilina Schlumberger, 1887. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=112042 on 2026-08-27
Schlumberger, C. (1887). Note sur le genre Planispirina. Bulletin de la Société Zoologique de France. 12:475-488.
Heron-Allen, E.; Earland, A. (1922). Protozoa, Part 2. Foraminifera. Natural History Reports of the British Antarctic ("Terra Nova") Expedition. 6: 25-268.