Sigmodontinae (New World rats and mice)
About 400 species in about 83 extant genera (I have also included some historically-extinct genera here): Abrawayaomys, Abrothrix, Aegialomys, Aepeomys, Akodon, Amphinectomys, Andalgalomys, Andinomys, Anotomys, Auliscomys, Bibimys, Blarinomys, Brucepattersonius, Calomys, Cerradomys, Chelemys, Chibchanomys, Chilomys, Chinchillula, Delomys, Deltamys, Drymoreomys, Eligmodontia, Eremoryzomys, Euneomys, Euryoryzomys, Galenomys, Geoxus, Graomys, Handleyomys, Holochilus, Hylaeamys, Ichthyomys, Irenomys, Juliomys, Juscelinomys, Kunsia, Lenoxus, Loxodontomys, Lundomys, Megalomys [extinct], Megaoryzomys [extinct], Melanomys, Microakodontomys, Microryzomys, Mindomys, Neacomys, Necromys, Nectomys, Neomicroxus, Neotomys, Nephelomys, Nesoryzomys, Neusticomys, Noronhomys [extinct], Notiomys, Oecomys, Oligoryzomys, Oreoryzomys, Oryzomys, Oxymycterus, Pattonimus, Phaenomys, Phyllotis, Podoxymys, Pseudoryzomys, Punomys, Reithrodon, Rhagomys, Rheomys, Rhipidomys, Salinomys, Scapteromys, Scolomys, Sigmodon, Sigmodontomys, Sooretamys, Tanyuromys, Tapecomys, Thalpomys, Thaptomys, Thomasomys, Transandinomys, Wiedomys, Wilfredomys, Zygodontomys.
Only twenty-two species are represented in the Zoochat galleries, from fourteen genera: Abrothrix, Akodon, Andalgalomys, Auliscomys, Calomys, Graomys, Irenomys, Oecomys, Oligoryzomys, Phyllotis, Reithrodon, Rhipidomys, Sigmodon and Sooretamys.
There are three subfamilies of exclusively New World rodents in Cricetidae: Neotominae (c.125 spp), Tylominae (11 spp), and Sigmodontinae (c.400 spp). There is some dispute about how best to arrange these three groups. Some authors would combine them all under this subfamily (Sigmodontinae); others split them into three subfamilies. I have followed the latter course and split them in three.
The subfamily Sigmodontinae is divided into eight Tribes as below. There is also the genus Juliomys with four species, which nobody knows where to place.
Sigmodontini (cotton rats)
About 14 species in the single genus Sigmodon
Three of the species are depicted here.
Ichthyomyini (fish-eating rats and water mice)
About 17 species in five genera: Anotomys, Chibchanomys, Ichthyomys, Neusticomys, Rheomys
None of the species are depicted here.
Oryzomyini (rice rats)
About 125 species in 30 extant genera: Aegialomys, Amphinectomys, Cerradomys, Drymoreomys, Eremoryzomys, Euryoryzomys, Handleyomys, Holochilus, Hylaeamys, Lundomys, Megalomys [extinct], Megaoryzomys [extinct], Melanomys, Microakodontomys, Microryzomys, Mindomys, Neacomys, Nectomys, Nephelomys, Nesoryzomys, Noronhomys [extinct], Oecomys, Oligoryzomys, Oreoryzomys, Oryzomys, Pattonimus, Pseudoryzomys, Scolomys, Sigmodontomys, Sooretamys, Tanyuromys, Transandinomys, Zygodontomys
Seven species are depicted here, from the genera Oecomys, Oligoryzomys and Sooretamys.
Thomasomyini (South American mice)
About 70 species in nine genera: Abrawayaomys, Aepeomys, Chilomys, Delomys, Phaenomys, Rhagomys, Rhipidomys, Thomasomys, Wilfredomys
One of the species is depicted here, from the genus Rhipidomys.
Wiedomyini (red-nosed mice)
Two species in the single genus Wiedomys
None of the species are depicted here.
Abrotrichini (long-clawed mice)
About 14 species in four genera: Abrothrix, Chelemys, Geoxus, Notiomys
Two species are depicted here, from the genus Abrothrix.
Akodontini (South American grass mice)
About 90 species in 15 genera: Akodon, Neomicroxus, Bibimys, Blarinomys, Brucepattersonius, Deltamys, Juscelinomys, Kunsia, Lenoxus, Necromys, Oxymycterus, Podoxymys, Scapteromys, Thalpomys, Thaptomys
One species is depicted here, from the genus Akodon.
Phyllotini (leaf-eared mice)
About 65 species in 17 genera: Andalgalomys, Andinomys, Auliscomys, Calomys, Chinchillula, Eligmodontia, Euneomys, Galenomys, Graomys, Irenomys, Loxodontomys, Neotomys, Phyllotis, Punomys, Reithrodon, Salinomys, Tapecomys
Eight species are depicted here, from the genera Andalgalomys, Auliscomys, Calomys, Graomys, Irenomys, Phyllotis and Reithrodon.
In the following posts the genera will be presented as per the above (alphabetically within individual Tribes).
