Myocastorini

{{Short description|Tribe of rodents}} {{Automatic taxobox | fossil_range = | image = Nutria Myocastor coypus Wildpark Poing-10.jpg | image_caption = Nutria (''Myocastor coypus'') | taxon = Myocastorini | authority = Fabre et al. 2017 <ref name="Fabre2017"/> | subdivision_ranks = Genera | subdivision = ''Callistomys''<br /> ''Hoplomys''<br /> ''Myocastor''<br /> ''Proechimys''<br /> ''Thrichomys'' }}

'''Myocastorini''' is a tribe of echimyid rodents, proposed in 2017, and containing the five extant genera ''Callistomys'', ''Hoplomys'', ''Myocastor'', ''Proechimys'', and ''Thrichomys''.<ref name="Fabre2017">{{Cite journal|last1=Fabre|first1=Pierre-Henri|last2=Upham|first2=Nathan S.|last3=Emmons|first3=Louise H.|last4=Justy|first4=Fabienne|last5=Leite|first5=Yuri L. R.|last6=Loss|first6=Ana Carolina |last7=Orlando|first7=Ludovic|last8=Tilak|first8=Marie-Ka|last9=Patterson|first9=Bruce D.|last10=Douzery|first10=Emmanuel J. P.|date=2017-03-01|title=Mitogenomic Phylogeny, Diversification, and Biogeography of South American Spiny Rats|journal=Molecular Biology and Evolution|volume=34|issue=3|pages=613–633|doi=10.1093/molbev/msw261|pmid=28025278|issn=0737-4038|doi-access=free}}</ref>

== Definition == Myocastorini members share long upper incisor roots (except ''Callistomys''), and mid- to long-sized lower incisor roots. These five genera share either four (''Callistomys'', ''Thrichomys'') or five (''Hoplomys'', ''Myocastor'', ''Proechimys'') lophids on the lower deciduous fourth premolar, three roots anchoring the upper molars, and well-connected lophs on cheek teeth.<ref name="Fabre2017"/>

Members display a variety of lifestyles including terrestrial (''Hoplomys'', ''Proechimys'', ''Thrichomys''), arboreal (''Callistomys''), and amphibious (''Myocastor'') adaptations.

== Phylogeny == On the one hand, the genus ''Proechimys'' is the sister group to the genus ''Hoplomys'' (armored rats), and both form a clade of lowland rainforest terrestrial spiny rats. On the other hand, ''Callistomys'' (painted tree-rats) is the sister group to ''Myocastor'' (coypus). In turn, these two pairs of genera share evolutionary affinities with ''Thrichomys'' (punaré).

{{cladogram |title=Genus-level cladogram of the Myocastorini. |caption=The cladogram has been reconstructed from mitochondrial and nuclear DNA characters.<ref name="Galewski2005">{{Cite journal|last1=Galewski|first1=Thomas|last2=Mauffrey|first2=Jean-François|last3=Leite|first3=Yuri L. R.|last4=Patton|first4=James L.|last5=Douzery|first5=Emmanuel J. P.|year=2005|title=Ecomorphological diversification among South American spiny rats (Rodentia; Echimyidae): a phylogenetic and chronological approach|journal=Molecular Phylogenetics and Evolution|volume=34|issue=3|pages=601–615|doi=10.1016/j.ympev.2004.11.015|pmid=15683932}}</ref><ref name="Upham2012">{{Cite journal|last1=Upham|first1=Nathan S.|last2=Patterson|first2=Bruce D.|year=2012|title=Diversification and biogeography of the Neotropical caviomorph lineage Octodontoidea (Rodentia: Hystricognathi)|journal=Molecular Phylogenetics and Evolution|volume=63|issue=2|pages=417–429|doi=10.1016/j.ympev.2012.01.020|pmid=22327013}}</ref><ref name="Fabre2013">{{Cite journal|last1=Fabre|first1=Pierre-Henri|last2=Galewski|first2=Thomas|last3=Tilak|first3=Marie-ka|last4=Douzery|first4=Emmanuel J. P.|date=2013-03-01|title=Diversification of South American spiny rats (Echimyidae): a multigene phylogenetic approach|journal=Zoologica Scripta|language=en|volume=42|issue=2|pages=117–134|doi=10.1111/j.1463-6409.2012.00572.x|s2cid=83639441 |issn=1463-6409}}</ref><ref name="Loss2014">{{Cite journal|last1=Loss|first1=Ana|last2=Moura|first2=Raquel T.|last3=Leite|first3=Yuri L. R.|date=2014|title=Unexpected phylogenetic relationships of the painted tree rat ''Callistomys pictus'' (Rodentia: Echimyidae)|url=http://www.naturezaonline.com.br/natureza/conteudo/pdf/05_LossACetal_132-136.pdf|journal=Natureza on Line|volume=12|pages=132–136|archive-date=2021-06-23|access-date=2017-10-08|archive-url=https://web.archive.org/web/20210623231029/http://www.naturezaonline.com.br/natureza/conteudo/pdf/05_LossACetal_132-136.pdf}}</ref><ref name="Fabre2014">{{Cite journal|last1=Fabre|first1=Pierre-Henri|last2=Vilstrup|first2=Julia T.|last3=Raghavan|first3=Maanasa|last4=Der Sarkissian|first4=Clio|last5=Willerslev|first5=Eske|last6=Douzery|first6=Emmanuel J. P.|last7=Orlando|first7=Ludovic|date=2014-07-01|title=Rodents of the Caribbean: origin and diversification of hutias unravelled by next-generation museomics|journal=Biology Letters|language=en|volume=10|issue=7|article-number=20140266|doi=10.1098/rsbl.2014.0266|pmid=25115033|issn=1744-9561|pmc=4126619}}</ref><ref name="Upham2015">{{Cite book|title=Biology of caviomorph rodents: diversity and evolution|last1=Upham|first1=Nathan S.|last2=Patterson|first2=Bruce D.|publisher=SAREM Series A, Mammalogical Research — Sociedad Argentina para el Estudio de los Mamíferos|year=2015|editor-last1=Vassallo|editor-first1=Aldo Ivan|location=Buenos Aires|pages=63–120|chapter=Evolution of Caviomorph rodents: a complete phylogeny and timetree for living genera|editor-last2=Antenucci|editor-first2=Daniel}}</ref><ref name="Fabre2016">{{Cite book|title=Handbook of the Mammals of the World. Vol 6. Lagomorphs and Rodents I|last1=Fabre|first1=Pierre-Henri|last2=Patton|first2=James L.|last3=Leite|first3=Yuri L. R.|year=2016|isbn=978-84-941892-3-4|editor-last1=Wilson|editor-first1=Don E.|editor-last2=Lacher|editor-first2=Thomas E. Jr|editor-last3=Mittermeier|editor-first3=Russell A.|publisher=Lynx Edicions|location=Barcelona|pages=552–641|chapter=Family Echimyidae (hutias, South American spiny-rats and coypu)|title-link=Handbook of the Mammals of the World}}</ref><ref name="Fabre2017"/> |align=center |clades={{Cladogram of Myocastorini genera}} }}

== References == {{Reflist}}

Category:Myocastorini Category:Echimyinae Category:Mammal tribes