Supplemental jurisdiction

Supplemental jurisdiction is the authority of United States federal courts to hear additional claims substantially related to the original claim even though the court would lack the subject-matter jurisdiction to hear the additional claims independently. 28 U.S.C. § 1367 is a codification of the Supreme Court's rulings on ancillary jurisdiction (Owen Equipment & Erection Co. v. Kroger, 437 U.S.365(1978)) and pendent jurisdiction (United Mine Workers of America v. Gibbs, 383 U.S.715(1966)) and a superseding of the Court's treatment of pendent party jurisdiction (Finley v. United States, 490 U.S.545(1989)).