Guiara
Genus of mammals belonging to the spiny rat family of rodents
From Wikipedia, the free encyclopedia
Euryzygomatomys is a genus of South American rodents, commonly called guiaras, in the family Echimyidae.[1] It contains two extant and one fossil species, found in Argentina, Brazil, and Paraguay. They are:
- Brandt's guiara (E. guiara)
- Fischer's guiara (E. spinosus)
- †E. hoffstetteri Goeldi 1901 - Tarija Formation, Bolivia[2]
| Euryzygomatomys | |
|---|---|
| |
| E. spinosus (1826) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Rodentia |
| Family: | Echimyidae |
| Subfamily: | Euryzygomatomyinae |
| Genus: | Euryzygomatomys Goeldi 1901 |
| Type species | |
| Rattus spinosus G. Fischer 1814 | |
| Species | |
Etymology
Phylogeny
Euryzygomatomys is the sister genus to Clyomys. Both taxa are closely related to the genus Trinomys. In turn, these three genera — forming the clade of Euryzygomatomyinae — share phylogenetic affinities with a clade containing Carterodon and members of the family Capromyidae.
Analyses of craniodental characters proposed that Euryzygomatomys — and also Clyomys — may be associated with Carterodon.[5][6] However, molecular data suggest the polyphyly of this assemblage of fossorial genera.[7]
| Genus-level cladogram of the Euryzygomatomyinae with their relationship to Carterodon and Capromyidae. | ||
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| The cladogram has been reconstructed from mitochondrial and nuclear DNA characters.[8][9][10][11][12][7] According to this phylogenetic tree, the fossorial genera Euryzygomatomys, Clyomys, and Carterodon constitute a polyphyletic assemblage (red bar). |