Orretherium

Orretherium; Temporal range: Late Cretaceous, Campanian–Maastrichtian PreꞒ Ꞓ O S D C P T J K Pg N
	Lower jaw
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Clade:	† Meridiolestida
Family:	† Mesungulatidae
Genus:	† Orretherium ; Martinelli et al., 2021
Species:	†O. tzen
Binomial name
	†Orretherium tzen; Martinelli et al., 2021

Last updated June 19, 2025

Orretherium (meaning "Five teeth beast"; in part from the Aonikenk language) is a genus of mesungulatid mammal that lived in South America (Chile) during the Late Cretaceous period in what is now the Dorotea Formation.^[1]^[2] It is estimated to have weighed ~1.3kg.^[3]

References

↑ Martinelli, A. G.; Soto-Acuña, S.; Goin, F. J.; Kaluza, J.; Bostelmann, J. E.; Fonseca, P. H. M. F.; Reguero, M. A.; Leppe, M.; Vargas, A. O. (2021). "New cladotherian mammal from southern Chile and the evolution of mesungulatid meridiolestidans at the dusk of the Mesozoic era". Scientific Reports. 11 (7594): 7594. Bibcode:2021NatSR..11.7594M. doi: 10.1038/s41598-021-87245-4 . hdl: 11336/166809 . PMC 8027844 . PMID 33828193.
↑ "Scientists unearth skunk that walked among dinosaurs". CBC News. Reuters. April 9, 2021. Retrieved April 9, 2021.
↑ Chimento, Nicolás R.; Agnolín, Federico L.; García-Marsà, Jordi; Manabe, Makoto; Tsuihiji, Takanobu; Novas, Fernando E. (2024-02-03). "A large therian mammal from the Late Cretaceous of South America". Scientific Reports. 14 (1): 2854. doi:10.1038/s41598-024-53156-3. ISSN 2045-2322. PMC 10838296 .

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[1] Martinelli, A. G.; Soto-Acuña, S.; Goin, F. J.; Kaluza, J.; Bostelmann, J. E.; Fonseca, P. H. M. F.; Reguero, M. A.; Leppe, M.; Vargas, A. O. (2021). "New cladotherian mammal from southern Chile and the evolution of mesungulatid meridiolestidans at the dusk of the Mesozoic era". Scientific Reports. 11 (7594): 7594. Bibcode:2021NatSR..11.7594M. doi: 10.1038/s41598-021-87245-4 . hdl: 11336/166809 . PMC 8027844 . PMID 33828193.

[2] "Scientists unearth skunk that walked among dinosaurs". CBC News. Reuters. April 9, 2021. Retrieved April 9, 2021.

[3] Chimento, Nicolás R.; Agnolín, Federico L.; García-Marsà, Jordi; Manabe, Makoto; Tsuihiji, Takanobu; Novas, Fernando E. (2024-02-03). "A large therian mammal from the Late Cretaceous of South America". Scientific Reports. 14 (1): 2854. doi:10.1038/s41598-024-53156-3. ISSN 2045-2322. PMC 10838296 .

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