Altacreodus

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.

Altacreodus
Temporal range: Late Cretaceous, 68–66 Ma
↓
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)

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

  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.
  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.
  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.
  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.
  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.
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