PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Cephalomys arcidens

Osteichthyes - Rodentia - Cephalomyidae

Taxonomy

Cephalomys arcidens was named by Ameghino (1897). Its type specimen is MACN A 12112/52-88, a partial skull, and it is a 3D body fossil. Its type locality is Cabeza Blanca, which is in a Deseadan terrestrial shale/claystone in the Sarmiento Formation of Argentina. It is the type species of Cephalomys.

Synonyms

Cephalomys plexus was named by Ameghino (1897). It is a 3D body fossil. Its type locality is Cabeza Blanca, which is in a Deseadan terrestrial shale/claystone in the Sarmiento Formation of Argentina.

It was synonymized subjectively with Cephalomys arcidens by Busker et al. (2020).
Asteromys prospicuus was named by Ameghino (1897). It is a 3D body fossil. Its type locality is Cabeza Blanca, which is in a Deseadan terrestrial shale/claystone in the Sarmiento Formation of Argentina.

It was synonymized subjectively with Cephalomys plexus by Wood and Patterson (1959); it was synonymized subjectively with Cephalomys arcidens by Busker et al. (2020).
Orchiomys prostans was named by Ameghino (1897). It is a 3D body fossil. Its type locality is Cabeza Blanca, which is in a Deseadan terrestrial shale/claystone in the Sarmiento Formation of Argentina.

It was synonymized subjectively with Cephalomys arcidens by Wood and Patterson (1959), Busker et al. (2020).
Cephalomys prorsus was named by Ameghino (1902). It is a 3D body fossil. Its type locality is Cabeza Blanca, which is in a Deseadan terrestrial shale/claystone in the Sarmiento Formation of Argentina.

It was synonymized subjectively with Cephalomys plexus by Wood and Patterson (1959); it was synonymized subjectively with Cephalomys arcidens by Busker et al. (2020).
Asteromys annectens was named by Ameghino (1902). It is a 3D body fossil. Its type locality is Cabeza Blanca, which is in a Deseadan terrestrial shale/claystone in the Sarmiento Formation of Argentina.

It was synonymized subjectively with Cephalomys plexus by Wood and Patterson (1959); it was synonymized subjectively with Cephalomys arcidens by Busker et al. (2020).

Synonymy list

Year	Name and author
1897	Cephalomys arcidens Ameghino p. 493
1897	Cephalomys plexus Ameghino p. 493
1897	Asteromys prospicuus Ameghino p. 495
1897	Orchiomys prostans Ameghino p. 495
1902	Asteromys annectens Ameghino p. 37
1902	Cephalomys prorsus Ameghino p. 37
1914	Cephalomys prosus Loomis
1959	Cephalomys arcidens Wood and Patterson
1959	Cephalomys plexus Wood and Patterson
2020	Cephalomys arcidens Busker et al.

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
class	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
—	Euarchontoglires	Murphy et al. 2001
—	Gliriformes	Wyss and Meng 1996
—	Glires	()
—	Simplicidentata	()
order	Rodentia	Bowdich 1821
—	Ctenohystrica	Huchon et al. 2000
infraorder	Hystricognathi	(Tullberg 1899)
—	Caviomorpha	(Wood and Patterson 1955)
family	Cephalomyidae
genus	Cephalomys
species	arcidens

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.

†Cephalomys arcidens Ameghino 1897

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Invalid names: Asteromys annectens Ameghino 1902 [synonym], Asteromys prospicuus Ameghino 1897 [synonym], Cephalomys plexus Ameghino 1897 [synonym], Cephalomys prorsus Ameghino 1902 [synonym], Orchiomys prostans Ameghino 1897 [synonym]

Diagnosis

No diagnoses are available