Altacreodus

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Altacreodus
Temporal range: 70.0–66.043 Ma
↓
 Late Cretaceous
Altacreodus magnus - 1.jpg
lower jaw of Altacreodus magnus
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Mirorder: Ferae
Clade: Pan-Carnivora
Genus: †Altacreodus
Fox, 2015[1]
Type species
†Altacreodus magnus
Clemens & Russell, 1965[2]
Synonyms
synonyms of species:
  • A. magnus:
    • Cimolestes magnus (Clemens & Russell, 1965)

Altacreodus ("creodont from Alberta")[1] is a extinct genus of one of the earliest known placental mammal. 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, which was renamed Altacreodus magnus in 2015.[1] Recent phylogenetic analyses suggests that genus Altacreodus is member of clade Ferae and closest known sister taxon to genus . With this genus it forms stem group of mammals close to crown group of order Hyaenodonta.[3][4]

Phylogeny[]

The phylogenetic relationships of genus Altacreodus are shown in the following cladogram.[5][6][4]

 Ferae 
 

Pholidotamorpha Pangolin Hardwicke (white background).jpg

 
  
 

†Oxyaenodonta Patriofelis ferox by R. B. Horsfall (coloured).png

 
 
 

Carnivoramorpha Dogs, jackals, wolves, and foxes (Plate XI).jpg

 
 †Hyaenodonta 
 

†Hyaenodonta (sensu stricto) Hyaenodon horridus by R. B. Horsfall (coloured).jpg

 
 
 

†

 
 †Altacreodus 

†Altacreodus magnus

 
†Altacreodus/Tinerhodon clade
 
 sensu lato 
 
 
 

References[]

  1. ^ a b c 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. ^ Clemens, W. A. Jr. and Russell, L. S. (1965.) "Mammalian fossils from the upper Edmonton Formation." University of Alberta Geology Bulletin, 2: 32–40.
  3. ^ 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.
  4. ^ a b 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.
  5. ^ 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.
  6. ^ 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.
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