PBDB Taxon

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

Parasteiromys

Mammalia - Rodentia - Erethizontidae

Taxonomy

Parasteiromys was named by Ameghino (1904). Its type is Parasteiromys uniformis.

It was assigned to Coendidae by Ameghino (1904); and to Erethizontidae by McKenna and Bell (1997), Candela (1999) and Vucetich et al. (2010).

Species

P. friantae, P. uniformis (type species)

Synonymy list

Year	Name and author
1904	Parasteiromys Ameghino p. 101
1997	Parasteiromys McKenna and Bell
1999	Parasteiromys Candela
2010	Parasteiromys Vucetich et al.

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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
—	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)
superfamily	Erethizontoidea	Bonaparte 1845
family	Erethizontidae	Bonaparte 1845
genus	Parasteiromys

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.

G. †Parasteiromys Ameghino 1904

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†Parasteiromys friantae Candela 1999

†Parasteiromys uniformis Ameghino 1904

Diagnosis

Reference	Diagnosis
A. M. Candela 1999	it differs from the remaining erethizontids in the following combination of characters: DP3 present; hypocone of the molariforms placed lingually to the protocone; lack of mure with the consequent communication between hypo- and mesoflexus; labial cusps scarcely developed; early closing of para- and metafossettes; posteroloph higher than metaloph; lingual face of the protocone parallel or slightly oblique respect to the anteroposterior axis of the tooth; upper incisor with anterior face slightly convex.

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialsubc

Locomotion:

actively mobilec

Life habit:

arborealf

Diet:

herbivoref

Reproduction:

viviparoussubc

Created:

2005-06-08 10:11:09

Modified:

2005-08-26 13:29:34

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

References: Carroll 1988, Lillegraven 1979, Ji et al. 2002, Nowak 1991, Hendy et al. 2009

Age range: Colhuehuapian or 21.00000 to 17.50000 Ma

Collections: one only

Time interval	Ma	Country or state	Original ID and collection number
Colhuehuapian	21.0 - 17.5	Argentina (Chubut)	P. uniformis, P. friantae (141368)