PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Arctocyon acrogenius

Mammalia - Procreodi - Arctocyonidae

Taxonomy

Claenodon acrogenius was named by Gazin (1956). Its type specimen is USNM 20634, a mandible, and it is not a trace fossil. Its type locality is Saddle, which is in a Tiffanian terrestrial horizon in Wyoming.

It was recombined as Mentoclaenodon acrogenius by Van Valen (1978); it was recombined as Arctocyon acrogenius by Kondrashov and Lucas (2004).

Synonyms

Arctocyonides mumak was named by Van Valen (1978). Its type specimen is PU 17406 and is a 3D body fossil.

It was recombined as Claenodon mumak by Winterfeld (1982); it was recombined as Arctocyon mumak by Archibald et al. (1987), Williamson and Lucas (1993), Secord (1998); it was synonymized subjectively with Arctocyon acrogenius by Kondrashov and Lucas (2004).

Synonymy list

Year	Name and author
1956	Claenodon acrogenius Gazin pp. 34-35
1978	Arctocyonides mumak Van Valen
1978	Mentoclaenodon acrogenius Van Valen
1978	Arctocyonides mumak Van Valen pp. 55 - 56
1982	Claenodon mumak Winterfeld
1987	Arctocyon mumak Archibald et al.
1993	Arctocyon mumak Williamson and Lucas
1998	Arctocyon mumak Secord
2004	Arctocyon acrogenius Kondrashov and Lucas p. 19

Is something missing? Join the Paleobiology Database and enter the data

Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
subclass	Synapsida
—	Therapsida	()

Rank	Name	Author
infraorder	Cynodontia	()
—	Mammaliamorpha
—	Mammaliaformes
class	Mammalia
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Boreoeutheria
—	Laurasiatheria
—	Scrotifera
—	Euungulata
order	Procreodi	Matthew 1915
family	Arctocyonidae	Murray 1866
genus	Arctocyon	Blainville 1841
species	acrogenius	()

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Arctocyon acrogenius Gazin 1956

show all | hide all

Invalid names: Arctocyonides mumak Van Valen 1978 [synonym]

Diagnosis

Reference	Diagnosis
P. E. Kondrashov and S. G. Lucas 2004	Differs from the A. ferox and A. corrugatus in its larger size (25 and 40 % respectively). The crowns of the upper teeth have a more square shape than in A. ferox. The cusps are low, and the paracone and metacone are close to each other. The p2 is greatly reduced or absent.

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialsubc

Locomotion:

actively mobilec

Life habit:

ground dwellingf

Diet:

omnivoref

Reproduction:

viviparoussubc

Created:

2005-08-31 13:54:39

Modified:

2011-04-24 18:06:44

Source: f = family, subc = subclass, c = class, subp = subphylum

References: Lillegraven 1979, Archibald 1998, Carroll 1988, Ji et al. 2002, Hendy et al. 2009

Age range: base of the Torrejonian to the top of the Tiffanian or 63.80000 to 56.20000 Ma

Collections (14 total)

Time interval	Ma	Country or state	Original ID and collection number
Torrejonian	63.8 - 60.9	USA (Texas)	Claenodon mumak (14956)
Ti4	60.9 - 56.2	Canada (Saskatchewan)	Arctocyon mumak (14978)
Tiffanian	60.9 - 56.2	USA (Wyoming)	Arctocyon mumak (14950 15060 15061 190407 190411) Claenodon acrogenius (14964 type locality: 14989 15017) Claenodon mumak (14952)
Tiffanian	60.9 - 56.2	USA (Colorado)	Arctocyonides mumak (174227)
Late/Upper Paleocene	59.24 - 56.0	USA (Wyoming)	Arctocyon mumak (15018 15024)