Altacreodus

Altacreodus; Temporal range: Late Cretaceous, 68–66 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
	lower jaw of Altacreodus magnus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Clade:	Ferae
Genus:	†Altacreodus; Fox, 2015
Type species
	†Altacreodus magnus; Clemens & Russell, 1965
Synonyms
	Cimolestes magnus (Clemens & Russell, 1965);

Altacreodus ("creodont from Alberta")[1] is a genus of one of the oldest known placental mammals. Fossils have been found in North America where they first appeared during the Late Cretaceous, and they died out prior to the start of the Paleocene.

The type species is "Cimolestes" magnus but was renamed to Altacreodus magnus in 2015.[1] Recent phylogenetic analyses suggests that genus Altacreodus is member of clade Ferae and closest known sister taxon to genus Tinerhodon. With this genus it forms stem group of mammals close to crown group of order Hyaenodonta.[2][3][4][5]

Ferae

Pholidotamorpha

Pan-Carnivora

†Oxyaenodonta

Carnivoramorpha

†Hyaenodonta

†Hyaenodonta (sensu stricto)

	†Tinerhodon

†Altacreodus	†Altacreodus magnus

†Altacreodus/Tinerhodon clade

sensu lato

References

Richard C. Fox (2015). "A revision of the Late Cretaceous–Paleocene eutherian mammal Cimolestes (Marsh, 1889)". Canadian Journal of Earth Sciences. 52 (12): 1137–1149. doi:10.1139/cjes-2015-0113.
Zack, S. P. (2011). "New species of the rare early Eocene creodont Galecyon and the radiation of early Hyaenodontidae". Journal of Paleontology. 85 (2): 315–336. doi:10.1666/10-093.1.
Borths, Matthew R; Stevens, Nancy J (2017). "Deciduous dentition and dental eruption of Hyainailouroidea (Hyaenodonta, "Creodonta," Placentalia, Mammalia)". Palaeontologia Electronica. 20 (3): 55A. doi:10.26879/776.
Matthew R. Borths; Nancy J. Stevens (2019). "Simbakubwa kutokaafrika, gen. et sp. nov. (Hyainailourinae, Hyaenodonta, 'Creodonta,' Mammalia), a gigantic carnivore from the earliest Miocene of Kenya". Journal of Vertebrate Paleontology. 39 (1): e1570222. doi:10.1080/02724634.2019.1570222.
Floréal Solé; Bernard Marandat; Fabrice Lihoreau (2020). "The hyaenodonts (Mammalia) from the French locality of Aumelas (Hérault), with possible new representatives from the late Ypresian". Geodiversitas. 42 (13): 185–214. doi:10.5252/geodiversitas2020v42a13.

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[Fox2015-1] Richard C. Fox (2015). "A revision of the Late Cretaceous–Paleocene eutherian mammal Cimolestes (Marsh, 1889)". Canadian Journal of Earth Sciences. 52 (12): 1137–1149. doi:10.1139/cjes-2015-0113.

[Zack2011-2] Zack, S. P. (2011). "New species of the rare early Eocene creodont Galecyon and the radiation of early Hyaenodontidae". Journal of Paleontology. 85 (2): 315–336. doi:10.1666/10-093.1.

[Matthew2017-3] Borths, Matthew R; Stevens, Nancy J (2017). "Deciduous dentition and dental eruption of Hyainailouroidea (Hyaenodonta, "Creodonta," Placentalia, Mammalia)". Palaeontologia Electronica. 20 (3): 55A. doi:10.26879/776.

[Simbakubwa-4] Matthew R. Borths; Nancy J. Stevens (2019). "Simbakubwa kutokaafrika, gen. et sp. nov. (Hyainailourinae, Hyaenodonta, 'Creodonta,' Mammalia), a gigantic carnivore from the earliest Miocene of Kenya". Journal of Vertebrate Paleontology. 39 (1): e1570222. doi:10.1080/02724634.2019.1570222.

[Geodiversitas4213-5] Floréal Solé; Bernard Marandat; Fabrice Lihoreau (2020). "The hyaenodonts (Mammalia) from the French locality of Aumelas (Hérault), with possible new representatives from the late Ypresian". Geodiversitas. 42 (13): 185–214. doi:10.5252/geodiversitas2020v42a13.