S.D. Codified Laws § 47-25-13
Formation of single corporation--Surviving corporation
When a merger or consolidation has been effected pursuant to this chapter, the several corporations parties to the plan of merger or consolidation shall be a single corporation, which, in the case of a merger, shall be that corporation designated in the plan of merger as the surviving corporation, and, in the case of a consolidation, shall be the new corporation provided for in the plan of consolidation.
Source: SL 1965, ch 24, § 44 (1).