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Boessenecker, R. W., Poust, A. W., Boessenecker, S. J. and Churchill, M. 2023. Tusked walruses (Carnivora: Odobenidae) from the Miocene-Pliocene Purisima Formation of Santa Cruz, California (U.S.A.): a new species of the toothless walrus Valenictus and the oldest records of Odobeninae and Odobenini. Journal of Vertebrate Paleontology. Vol. 43(3), p. null.