2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/67679We describe a new family of examples of hypersurfaces in the sphere satisfying the limiting-case in C. Bär's extrinsic upper bound for the smallest eigenvalue of the Dirac operator.4 pages, French; to appear in C. R. Acad. Sci. ParisDifferential Geometrytext