Not extreme but well workerless or with workers inquilines.

Shigayev, C.; Snegovaya, N. 2022. Monomorium ellenarium sp. nov., a new inquilinous ant species (Hymenoptera: Formicidae) of the Monomorium monomorium group from Azerbaijan Republic. Munis Entomology & Zoology 17 (2):1197-1202.
Pdf:
https://antcat.org/documents/8277/shiga ... baijan.pdf
Pdf:
https://antcat.org/documents/8277/shiga ... baijan.pdf