Lasioglossum zonulus is a species of sweat bee in the family Halictidae. It is found in Europe and North America. While the name has historically been misspelled "zonulum" (e.g. [1]), the original name, zonulus, is a noun and does not change spelling under Article 31 of the ICZN, and some sources (e.g. [2]) have recognized this and adopted the correct spelling.