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Rincón, A. D., Solórzano, A., McDonald, H. G. and Montellano-Ballesteros, M. 2019. Two new megalonychid sloths (Mammalia: Xenarthra) from the Urumaco Formation (late Miocene), and their phylogenetic affinities. Journal of Systematic Palaeontology. Vol. 17(5), pp. 409-421.