Nanocuris is an extinct genus of Deltatheridiidae from the Cretaceous of Canada (Saskatchewan) and United States (Wyoming - Lance Formation and Hell Creek FormationG. P. Wilson and J. A. Riedel. 2010. New specimen reveals deltatheroidan affinities of the North American Late Cretaceous mammal Nanocuris. Journal of Vertebrate Paleontology 30(3):872-884).R. C. Fox, C. S. Scott, and H. N. Bryant. 2007. A new, unusual therian mammal from the Upper Cretaceous of Saskatchewan, Canada. Cretaceous Research 28(5):821-829. Initially, it was classified in a proper family, Nanocuridae, in the clade Eutheria, but a reanalysis of a new specimen revealed a delthatheroid affinity of the genus.G. P. Wilson and J. A. Riedel. 2010. New specimen reveals deltatheroidan affinities of the North American Late Cretaceous mammal Nanocuris. Journal of Vertebrate Paleontology 30(3):872-884
Size It was the largest deltatheroidean.G. W. Rougier, B. M. Davis, and M. J. Novacek. 2015. A deltatheroidan mammal from the Upper Cretaceous Baynshiree Formation, eastern Mongolia. Cretaceous Research 52:167-177G. P. Wilson and J. A. Riedel. 2010. New specimen reveals deltatheroidan affinities of the North American Late Cretaceous mammal Nanocuris. Journal of Vertebrate Paleontology 30(3):872-884 Alongside with the similarly sized Altacreodus, it likely replaced earlier Cretaceous eutriconodonts as a large sized predatory mammal.G. W. Rougier, B. M. Davis, and M. J. Novacek. 2015. A deltatheroidan mammal from the Upper Cretaceous Baynshiree Formation, eastern Mongolia. Cretaceous Research 52:167-177
Classification Its closest relative is the smallest deltatheroidean, Gurbanodelta.Ni, Xijun; Li, Qiang; Stidham, Thomas A.; Li, Lüzhou; Lu, Xiaoyu; Meng, Jin (2016). "A late Paleocene probable metatherian (?deltatheroidan) survivor of the Cretaceous mass extinction". Science Reports. 6. Springer Science and Business Media LLC: 38547. Bibcode:2016NatSR...638547N. doi:10.1038/srep38547. PMC 5141426. PMID 27924847.
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