| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Taxonomy
Guiomys unica was named by Pérez (2010). Its type specimen is MPEF-PV 3504, a mandible (Fragment of right mandible with p4-m3), and it is a 3D body fossil. It is the type species of Guiomys.
Synonymy list
| Year | Name and author |
|---|---|
| 2010 | Guiomys unica Pérez pp. 1849-1851 figs. 4-6 |
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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.
†Guiomys unica Pérez 2010
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. E. Pérez 2010 | G. 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
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| Source: o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Carroll 1988, Lillegraven 1979, Ji et al. 2002, Hendy et al. 2009, Nowak 1999 | |||||
Age range: base of the Colloncuran to the top of the Laventan or 15.50000 to 11.00000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Langhian | Argentina (Chubut) | Guiomys unica (133676) | |
| Colloncuran | Argentina (Río Negro) | Guiomys unica (142148) | |
| Laventan | Bolivia (Tarija) | Guiomys unica (38071 133664) |