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Guiomys

Mammalia - Rodentia

Taxonomy
Guiomys was named by Pérez (2010). Its type is Guiomys unica.

It was assigned to Cavioidea by Pérez (2010).

Species
G. unica (type species)

Synonymy list
YearName and author
2010Guiomys Pérez

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
RankNameAuthor
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentiaBowdich 1821
—CtenohystricaHuchon et al. 2000
infraorderHystricognathi(Tullberg 1899)
—Caviomorpha(Wood and Patterson 1955)
superfamilyCavioideaFischer de Waldheim 1817
genusGuiomys

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. †Guiomys Pérez 2010
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†Guiomys unica Pérez 2010
Diagnosis
ReferenceDiagnosis
M. E. Pérez 2010G. unica is diagnosed by the following autapomor- phic characters: notch for the insertion of the tendon of the mas- seter medialis pars infraorbitalis muscle located anteriorly and completely isolated from both the masseteric and the horizontal crests; presence of lingual flexids that are variable in length and that disappear with wear, but that do not form fossettids. Dif- fering from members of the ‘medialis series’ in notch for the in- sertion of the tendon of the masseter medialis pars infraorbitalis muscle connected to the horizontal crest and lacking flexi/ids (e.g., Dolichotis) or having them along the entire crown (e.g., Hy- drochoerus) and remaining open throughout life without forming fossettes/ids. Differing from the rest of Cavioidea sensu stricto in notch for the insertion of the tendon of the masseter medialis pars infraorbitalis muscle connected to the masseteric crest, and hav- ing flexi/ids that form fossettes/ids at least at some ontogenetic stage.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingo
Diet: herbivoreo
Reproduction: viviparoussubc
Created: 2005-08-26 14:04:46
Modified: 2005-08-26 16:04:46
Source: o = order, subc = subclass, c = class, subp = subphylum
References: Nowak 1999, Hendy et al. 2009, Ji et al. 2002, Carroll 1988, Lillegraven 1979

Age range: base of the Colloncuran to the top of the Laventan or 15.50000 to 11.00000 Ma

Collections (5 total)


Time interval Ma Country or state Original ID and collection number
Burdigalian - Langhian20.45 - 13.82Peru (Cuzco) G. sp. (144513)
Langhian15.98 - 13.82Argentina (Chubut) G. unica (133676)
Colloncuran15.5 - 13.8Argentina (Río Negro) G. unica (142148)
Laventan13.8 - 11.0Bolivia (Tarija) G. unica (38071 133664)