Mo. Rev. Stat. § 473.668

Administration proceedings and other procedures in this state with respect to property, tangible or intangible, of a nonresident decedent which is within the jurisdiction of this state are original proceedings or procedures conducted under the authority of this state solely, and are independent of and not ancillary to proceedings or procedures in any other state or country, and shall be had and conducted in this state as if the decedent were a resident, subject to and supplemented by the provisions in sections 473.671 to 473.694.