Dactylomys is a genus of rodents in the family Cricetidae, which is a group of small mammals that includes hamsters, gerbils, and mice.
Dactylomys is closely related to the genus Oxymycterus, and the two genera are thought to have diverged from a common ancestor around 10 million years ago.
The genus Dactylomys is divided into three species: Dactylomys dactylinus, Dactylomys peruvianus, and Dactylomys boliviensis.
Classification
The genus Dactylomys is a group of rodents that can be easily identified by their unique physical characteristic.
The name Dactylomys is derived from two Ancient Greek words, δάκτυλος (dáktulos) meaning "finger" and μῦς (mûs) meaning "mouse, rat".
These rodents have a distinctive feature where the middle two digits are especially elongated relative to the lateral ones.
The genus Dactylomys contains three species of rodents.
Here's a list of the three species of Dactylomys rodents:
- Dactylomys boliviensis (Bolivian bamboo rat)
- Dactylomys dactylinus (Amazon bamboo rat)
- Dactylomys peruanus (Montane bamboo rat)
Phylogeny
Dactylomys is a member of the Echimyini clade of arboreal Echimyidae rodents. This clade is comprised of unique species that share distinctive features.
The closest relative of Dactylomys is Olallamys, followed by Kannabateomys. These South American bamboo rats are grouped under the informal clade name of "Dactylomyines".
The dactylomyines are the sister genera to Diplomys and Santamartamys. These genera are closely related to Echimys, Phyllomys, Makalata, Pattonomys, and Toromys.
These genera share phylogenetic affinities with the clade containing Lonchothrix and Mesomys, as well as Isothrix.
Here's a simplified breakdown of the relationships:
These relationships were reconstructed from mitochondrial and nuclear DNA characters.
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