Bar pattern speeds in CALIFA galaxies - III. Solving the puzzle of ultrafast bars Virginia Cuomo, Yun Hee Lee, Chiara Buttitta, J. Alfonso L. Aguerri, Enrico Maria Corsini and Lorenzo Morelli A&A, 649 (2021) A30 Published online: 06 May 2021 DOI: 10.1051/0004-6361/202040261