PBDB Taxon

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

Cosoryx furcatus

Mammalia - Antilocapridae

Taxonomy

Cosoryx furcatus was named by Leidy (1869) [genotype; also said to be 1858].

It was recombined as Dicrocerus furcatus by Cope (1875) and Cope (1877); it was recombined as Merycodus furcatus by Hay (1902), Matthew (1904), Furlong (1927), Gregory (1942), Galbreath (1953), Green (1956), Voorhies (1990).

Subspecies

C. mooki, C. stembergi, C. sternbergi

Synonyms

Cosoryx agilis was named by Douglass (1899). It is a 3D body fossil.

It was recombined as Merycodus agilis by Hay (1902), Douglass (1903); it was synonymized subjectively with Cosoryx furcatus by Frick (1937); it was considered a nomen dubium by Matthew (1904) and Sutton (1977).
Cosoryx burgensis was named by Frick (1937).

It was synonymized subjectively with Merycodus furcatus by Voorhies (1990); it was synonymized subjectively with Cosoryx furcatus by Webb (1969), Janis and Manning (1998).
Cosoryx (Paracosoryx) burgensis was named by Frick (1937). Its type specimen is F:AM 32900, a partial skull (Right horn on frontlet, burrless), and it is a 3D body fossil. Its type locality is Burge Quarry, which is in a Barstovian/Clarendonian terrestrial horizon in the Valentine Formation of Nebraska.

It was synonymized subjectively with Cosoryx furcatus by Webb (1969); it was recombined as Paracosoryx burgensis by Skinner and Johnson (1984).

Synonymy list

Year	Name and author
1869	Cosoryx furcatus Leidy
1875	Dicrocerus furcatus Cope p. 257
1877	Dicrocerus furcatus Cope
1899	Cosoryx agilis Douglass p. 23 figs. Plate 4, Figure 1
1902	Merycodus agilis Hay p. 683
1902	Merycodus furcatus Hay p. 683
1903	Merycodus agilis Douglass
1904	Merycodus furcatus Matthew p. 122
1927	Merycodus furcatus Furlong
1937	Cosoryx burgensis Frick
1937	Cosoryx (Paracosoryx) burgensis Frick pp. 307, 343 figs. Figure 37A
1937	Cosoryx furcatus Frick p. 340
1942	Merycodus furcatus Gregory
1953	Merycodus furcatus Galbreath
1956	Merycodus furcatus Green
1967	Cosoryx furcatus Skinner and Taylor
1984	Paracosoryx burgensis Skinner and Johnson p. 293
1990	Merycodus furcatus Voorhies
1998	Cosoryx furcatus Janis and Manning
2001	Cosoryx agilis Tabrum and Nichols p. 91

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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	()
infraorder	Cynodontia	()
—	Mammaliamorpha

Rank	Name	Author
—	Mammaliaformes
class	Mammalia
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Boreoeutheria
—	Laurasiatheria
—	Scrotifera
—	Euungulata
—	Artiodactylamorpha
—	Artiodactyla	()
—	Ruminantiamorpha
—	Ruminantia	(Scopoli 1777)
—	Pecora	()
family	Antilocapridae
subfamily	Merycodontinae	()
genus	Cosoryx	Leidy 1869
species	furcatus	Leidy 1869

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.

†Cosoryx furcatus Leidy 1869

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†Cosoryx furcatus mooki Frick 1937

†Cosoryx furcatus stembergi Frick 1937

Invalid names: Cosoryx (Paracosoryx) burgensis Frick 1937 [synonym], Cosoryx agilis Douglass 1899 [synonym], Cosoryx burgensis Frick 1937 [synonym]

†Cosoryx furcatus sternbergi Frick 1937

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Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialo

Locomotion:

actively mobilec

Life habit:

ground dwellingf

Diet:

grazerg

Reproduction:

viviparoussubc

Created:

2009-01-04 10:47:24

Modified:

2009-01-04 12:47:24

Source: g = genus, f = family, o = order, subc = subclass, c = class, subp = subphylum

References: Carroll 1988, Lillegraven 1979, Nowak 1999, Solounias and Moelleken 1993, Nowak 1991, Hendy et al. 2009

Age range: base of the Barstovian to the top of the Clarendonian or 16.30000 to 9.40000 Ma

Collections (46 total)

Time interval	Ma	Country or state	Original ID and collection number
Miocene	23.03 - 5.333	USA (South Dakota)	Merycodus furcatus (18084 18085 18183 18380 18383 18384)
Miocene	23.03 - 5.333	USA (Kansas)	Cosoryx furcatus (18122)
Miocene	23.03 - 5.333	USA (Nebraska)	Cosoryx furcatus (18210)
Barstovian	16.3 - 12.5	USA (Nevada)	Merycodus furcatus (19088)
Barstovian	16.3 - 12.5	USA (Nebraska)	Cosoryx furcatus (18144) Merycodus furcatus (18443)
Barstovian - Clarendonian	16.3 - 9.4	USA (Nebraska)	Cosoryx furcatus (18238 18270) Cosoryx furcatus, Cosoryx burgensis (18077)
Clarendonian	12.5 - 9.4	USA (South Dakota)	Merycodus furcatus (18063 18470 18472 18473 18478 18481 18485 18492 18493)
Clarendonian	12.5 - 9.4	USA (Nebraska)	Cosoryx furcatus (18060 18078 18106 18157 18159 18176 18204 18217 18233 18234 18243 18260 18294 18334 18413 18414 18456) Merycodus furcatus (18082 18483)
Clarendonian	12.5 - 9.4	USA (Nevada)	Merycodus furcatus (19035 182562)
Clarendonian - Hemphillian	12.5 - 4.9	USA (South Dakota)	Cosoryx furcatus (18087)
Late/Upper Miocene	11.608 - 5.333	Japan	Dicrocerus furcatus (52009)