Echimyini

Echimyini
Mesomys hispidus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Superfamily:	Octodontoidea
Family:	Echimyidae
Subfamily:	Echimyinae
Tribe:	Echimyini Fabre et al. 2016 [1]
Genera
Dactylomys Diplomys Echimys Isothrix Kannabateomys Lonchothrix Makalata Mesomys Olallamys Pattonomys Phyllomys Santamartamys Toromys

Echimyini is a tribe of echimyid rodents, proposed in 2016, and containing 13 extant genera: all of the tree rats Echimys , Phyllomys , Makalata , Pattonomys , Toromys , Diplomys , Santamartamys , and Isothrix , the long recognized dactylomines Dactylomys , Olallamys , and Kannabateomys , and the enigmatic and previously classified as eumysopines Lonchothrix and Mesomys . ^{[1] [2]} All these spiny rats genera are arboreal. Worth of note, the arboreal genus Callistomys – the painted-tree rat – does not belong to the tribe Echimyini. Because it is phylogenetically closer to Myocastor , Hoplomys , Proechimys , and Thrichomys than to the above-mentioned Echimyini genera, it is classified in the tribe Myocastorini. ^{[3] [2]}

Phylogeny

Five assemblages can be distinguished in the genus-level cladogram of Echimyini:

• Echimys is closely related to Phyllomys, Makalata, Pattonomys and Toromys. This clade is in accordance with the fact that Phyllomys was classified within Echimys, ^[4] and that Pattonomys and Toromys were placed in Makalata. ^[5]
• Dactylomys, Olallamys, and Kannabateomys share unique features, and these South American bamboo rats are grouped under the informal clade name of "Dactylomyines". ^[1]
• Diplomys and Santamartamys are a sister group, reflecting the fact that the latter genus has been split from the former. ^[6]
• Lonchothrix and Mesomys are a sister group, and have often been classified within "Eumysopines", a subfamily otherwise shown to be polyphyletic. ^[1]
• Isothrix occupies an isolated, deep-branching position.

Genus-level cladogram of the Echimyini.

Echimyini               Isothrix   "Eumysopines"     Lonchothrix   (Tuft-tailed spiny tree-rat)   Mesomys                                           Pattonomys   Toromys   (Giant tree-rat)             Makalata   Echimys   Phyllomys   Diplomys   Santamartamys   (Red-crested tree-rat)   "Dactylomyines"     Kannabateomys   (Atlantic bamboo rat)             Dactylomys   Olallamys

The cladogram has been reconstructed from mitochondrial and nuclear DNA characters. [7] [8] [9] [10] [11] [3] [12] [13] [2]

References

1. Fabre, Pierre-Henri; Patton, James L.; Leite, Yuri L. R. (2016). "Family Echimyidae (hutias, South American spiny-rats and coypu)". In Wilson, Don E.; Lacher, Thomas E. Jr; Mittermeier, Russell A. (eds.). Handbook of the Mammals of the World. Vol 6. Lagomorphs and Rodents I. Barcelona: Lynx Edicions. pp. 552–641. ISBN   978-84-941892-3-4.
2. Fabre, Pierre-Henri; Upham, Nathan S.; Emmons, Louise H.; Justy, Fabienne; Leite, Yuri L. R.; Loss, Ana Carolina; Orlando, Ludovic; Tilak, Marie-Ka; Patterson, Bruce D.; Douzery, Emmanuel J. P. (2017-03-01). "Mitogenomic Phylogeny, Diversification, and Biogeography of South American Spiny Rats". Molecular Biology and Evolution. 34 (3): 613–633. doi: 10.1093/molbev/msw261 . ISSN   0737-4038. PMID   28025278.
3. Loss, Ana; Moura, Raquel T.; Leite, Yuri L. R. (2014). "Unexpected phylogenetic relationships of the painted tree rat Callistomys pictus (Rodentia: Echimyidae)" (PDF). Natureza on Line. 12: 132–136. Archived from the original (PDF) on 2021-06-23. Retrieved 2017-11-04.
4. Eisenberg, J. F.; Redford, K. H. (May 15, 2000). Mammals of the Neotropics, Volume 3: The Central Neotropics: Ecuador, Peru, Bolivia, Brazil. University of Chicago Press. pp. 487–488. ISBN   978-0-226-19542-1. OCLC   493329394.
5. Woods, C.A.; Kilpatrick, C.W. (2005). "Infraorder Hystricognathi". In Wilson, D.E.; Reeder, D.M (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. pp. 1538–1600. ISBN   978-0-8018-8221-0. OCLC   62265494.
6. Emmons, Louise Hickock (2005). "A revision of the genera of arboreal Echimyidae (Rodentia: Echimyidae, Echimyinae), with descriptions of two new genera". Mammalian Diversification: From Chromosomes to phylogeography (A Celebration of the Career of James L. Patton). Vol. 133. University of California Press. pp. 247–310. ISBN   978-0-520-09853-4.
7. Lara, Márcia C.; Patton, James L.; da Silva, Maria Nazareth F. (1996). "The Simultaneous Diversification of South American Echimyid Rodents (Hystricognathi) Based on Complete Cytochrome b Sequences". Molecular Phylogenetics and Evolution. 5 (2): 403–413. doi:10.1006/mpev.1996.0035. PMID   8728398.
8. Leite, Yuri L. R.; Patton, James L. (2002). "Evolution of South American spiny rats (Rodentia, Echimyidae): the star-phylogeny hypothesis revisited". Molecular Phylogenetics and Evolution. 25 (3): 455–464. doi:10.1016/s1055-7903(02)00279-8.
9. Galewski, Thomas; Mauffrey, Jean-François; Leite, Yuri L. R.; Patton, James L.; Douzery, Emmanuel J. P. (2005). "Ecomorphological diversification among South American spiny rats (Rodentia; Echimyidae): a phylogenetic and chronological approach". Molecular Phylogenetics and Evolution. 34 (3): 601–615. doi:10.1016/j.ympev.2004.11.015. PMID   15683932.
10. Upham, Nathan S.; Patterson, Bruce D. (2012). "Diversification and biogeography of the Neotropical caviomorph lineage Octodontoidea (Rodentia: Hystricognathi)". Molecular Phylogenetics and Evolution. 63 (2): 417–429. doi:10.1016/j.ympev.2012.01.020. PMID   22327013.
11. Fabre, Pierre-Henri; Galewski, Thomas; Tilak, Marie-ka; Douzery, Emmanuel J. P. (2013-03-01). "Diversification of South American spiny rats (Echimyidae): a multigene phylogenetic approach". Zoologica Scripta. 42 (2): 117–134. doi:10.1111/j.1463-6409.2012.00572.x. ISSN   1463-6409.
12. Fabre, Pierre-Henri; Vilstrup, Julia T.; Raghavan, Maanasa; Der Sarkissian, Clio; Willerslev, Eske; Douzery, Emmanuel J. P.; Orlando, Ludovic (2014-07-01). "Rodents of the Caribbean: origin and diversification of hutias unravelled by next-generation museomics". Biology Letters. 10 (7) 20140266. doi:10.1098/rsbl.2014.0266. ISSN   1744-9561. PMC   4126619 . PMID   25115033.
13. Upham, Nathan S.; Patterson, Bruce D. (2015). "Evolution of Caviomorph rodents: a complete phylogeny and timetree for living genera". In Vassallo, Aldo Ivan; Antenucci, Daniel (eds.). Biology of caviomorph rodents: diversity and evolution. Buenos Aires: SAREM Series A, Mammalogical Research — Sociedad Argentina para el Estudio de los Mamíferos. pp. 63–120.