Wyo. Stat. § 34-12-102
Every original owner or proprietor of any tract or parcel of land, who has heretofore subdivided, or shall hereafter subdivide the same into three (3) or more parts for the purpose of laying out any town or city, or any addition thereto, or any part thereof, or suburban lots, shall cause a plat of such subdivision, with references to known or permanent monuments, to be made, which shall accurately describe all the subdivisions of such tract or parcel of land, numbering the same by progressive numbers, and giving the dimensions, and length and breadth thereof, and the breadth and courses of all the streets and alleys established therein. Descriptions of lots or parcels of land in such subdivisions, according to the number and designation thereof, on said plat contained, in conveyances, or for the purposes of taxation, shall be deemed good and valid for all intents and purposes. The duty to file for record a plat, as provided herein, shall attach as a covenant of warranty, in all conveyances of any part or parcel of such subdivisions by the original owners or proprietors, against any and all assessments, costs and damages, paid, lost or incurred by any grantee, or person claiming under him, in consequence of the omission on the part of said owner or proprietors to file such plat.
W.S. 34-12-102