Haloquadratum walsbyi is a species of archaea discovered in a brine pool in the Sinai peninsula of Egypt. It is noted for its flat box-like cells.
- ^ Oren, A.; Ventosa, A.; Gutierrez, M. C.; Kamekura, M. (1 July 1999). "Haloarcula quadrata sp. nov., a square, motile archaeon isolated from a brine pool in Sinai (Egypt)". International Journal of Systematic Bacteriology 49 (3): 1149–1155. doi:10.1099/00207713-49-3-1149.