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Zietlow, A. R., Boyd, C. A. and Vranken, N. E. Van. 2023. Jormungandr walhallaensis: a new mosasaurine (Squamata: Mosasauroidea) from the Pierre Formation (Pembina Member: Campanian) of North Dakota. Bulletin of the American Museum of Natural History. Vol. 464, pp. 1-82.