Echimyinae

Echimyinae
Ferreira's spiny tree-rat, Mesomys hispidus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Parvorder:	Caviomorpha
Superfamily:	Octodontoidea
Family:	Echimyidae
Subfamily:	Echimyinae Gray 1825 [1]
Tribes
Echimyini Myocastorini

Echimyinae^[1] is a subfamily of rodents belonging to the spiny rats family Echimyidae.^[2] It contains 14 arboreal genera—all the members of the tribe Echimyini, plus Callistomys—a few terrestrial genera (Thrichomys, Hoplomys, and Proechimys), and a subaquatic genus (Myocastor).^[3]

Systematics

The taxonomic content of Echimyinae has been reshaped over time, because of two realizations. The first is a better understanding of the evolution of morphological characters, leading to the recognition that key character states long used to group genera into higher units were demonstrably homoplastic. The second came from the a phylogenetic analysis of molecular sequence data.^[3][4]

Comparison between molecular-based^[3] and traditional^[2] systematics for Echimyinae genera.

Genera	Molecular-based systematics	Traditional systematics
Echimys	Echimyini	Echimyinae
Phyllomys	Echimyini	Echimyinae
Makalata	Echimyini	Echimyinae
Pattonomys	Echimyini	Echimyinae
Toromys	Echimyini	Echimyinae
Diplomys	Echimyini	Echimyinae
Santamartamys	Echimyini	Echimyinae
Isothrix	Echimyini	Echimyinae
Dactylomys	Echimyini	Dactylomyinae
Olallamys	Echimyini	Dactylomyinae
Kannabateomys	Echimyini	Dactylomyinae
Lonchothrix	Echimyini	Eumysopinae
Mesomys	Echimyini	Eumysopinae
Callistomys	Myocastorini	Echimyinae
Myocastor	Myocastorini	Myocastoridae
Thrichomys	Myocastorini	Eumysopinae
Hoplomys	Myocastorini	Eumysopinae
Proechimys	Myocastorini	Eumysopinae

Phylogeny

The subfamily Echimyinae groups most of the spiny rat family's generic diversity into two tribes: Echimyini and Myocastorini.^[3]

Genus-level cladogram of the Echimyinae.

Echimyinae Myocastorini               Thrichomys (punaré)                       Callistomys (painted tree-rat)   Myocastor (nutria)             Hoplomys (armored rat)   Proechimys 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.[5][6][7][8][9][10][11][12][4]

References

1. Gray, J. E. (1825). "Outline of an attempt at the disposition of the Mammalia into tribes and families with a list of the genera apparently appertaining to each tribe". Annals of Philosophy. 10: 337–344.
2. Woods, C.A.; Kilpatrick, C.W. (2005). "Subfamily Echimyinae". In Wilson, D.E.; Reeder, D.M (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. ISBN 978-0-8018-8221-0. OCLC 62265494.
3. 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.
4. 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.
5. 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. Bibcode:1996MolPE...5..403L. doi:10.1006/mpev.1996.0035. PMID 8728398.
6. 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. Bibcode:2002MolPE..25..455L. doi:10.1016/s1055-7903(02)00279-8. PMID 12450750.
7. 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. Bibcode:2005MolPE..34..601G. doi:10.1016/j.ympev.2004.11.015. PMID 15683932.
8. 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. Bibcode:2012MolPE..63..417U. doi:10.1016/j.ympev.2012.01.020. PMID 22327013.
9. 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. S2CID 83639441.
10. 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.
11. 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.
12. 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.