Editing Opossum (section)

== Classification ==
{{main|List of didelphimorphs}}
{{cladogram
|title=Phylogeny of a 5,911 species 31 gene supertree<ref name="Upham 2019">{{Cite journal |last1=Upham |first1=Nathan S. |last2=Esselstyn |first2=Jacob A. |last3=Jetz |first3=Walter |date=2019 |title=Inferring the mammal tree: Species-level sets of phylogenies for questions in ecology, evolution and conservation |journal=PLOS Biol |volume=17 |issue=12 |pages=e3000494 |doi=10.1371/journal.pbio.3000494 |pmid=31800571 |pmc=6892540 |doi-access=free }}</ref><ref>{{cite journal |last1=Upham |first1=Nathan S. |last2=Esselstyn |first2=Jacob A. |last3=Jetz |first3=Walter |year=2019 |title=DR_on4phylosCompared_linear_richCol_justScale_ownColors_withTips_80in |url=https://github.com/n8upham/MamPhy_v1/blob/master/Fig6_compare_tipDRs/DR_on4phylosCompared_linear_richCol_justScale_ownColors_withTips_80in.pdf |journal=PLOS Biology |volume=17 |issue=12 |pages= e3000494|doi=10.1371/journal.pbio.3000494 |doi-access=free |pmid=31800571 |pmc=6892540 }}</ref>|
{{clade|style=font-size:90%;line-height:100%;width:350px;
|1={{clade
  |1={{clade
  |label1=[[Caluromyinae]]
  |1={{clade
    |1=''[[Caluromysiops]]''
    |2=''[[Caluromys]]''
     }}
     }}
  |2={{clade
    |1={{clade
    |label1=[[Glironiinae]]
    |1={{clade
      |1=''[[Chacodelphys]]''
      |2=''[[Glironia]]''
       }}
       }}
    |2={{clade
      |label1=[[Hyladelphinae]]
      |1=''[[Hyladelphys]]''
      |label2=[[Didelphinae]]
      |2={{clade
        |1={{clade
        |label1=Marmosini
        |1={{clade
          |1={{clade
            |1=''[[Tlacuatzin]]''
            |2=''[[Marmosa]]''
             }}
          |2=''[[Monodelphis]]''
           }}
           }}
        |2={{clade
          |1={{clade
            |label1=Metachirini
            |1=''[[Metachirus]]''
            |label2=Didelphini
            |2={{clade
              |1=''[[Chironectes]]''
              |2={{clade
                |1=''[[Lutreolina]]''
                |2={{clade
                  |1=''[[Philander (mammal)|Philander]]''
                  |2=''[[Didelphis]]''
                   }}
                 }}
               }}
             }}
          |2={{clade
          |label1=Thylamyini
          |1={{clade
            |1=''[[Marmosops]]''
            |2={{clade
              |1=''[[Cryptonanus]]''
              |2={{Clade
                |1=''[[Gracilinanus]]''
                |2={{clade
                  |1=''[[Lestodelphys]]''
                  |2=''[[Thylamys]]''
                   }}
                 }}
               }}
             }}
             }}
           }}
         }}
       }}
     }}
   }}
 }}
|}}

Classification based on Voss (2022), species based on the [[American Society of Mammalogists]] (2023)<ref>{{Cite journal |last=Voss |first=Robert S. |date=2022-04-04 |title=An Annotated Checklist of Recent Opossums (Mammalia: Didelphidae) |url=https://bioone.org/journals/bulletin-of-the-american-museum-of-natural-history/volume-455/issue-1/0003-0090.455.1.1/An-Annotated-Checklist-of-Recent-Opossums-Mammalia-Didelphidae/10.1206/0003-0090.455.1.1.full |journal=Bulletin of the American Museum of Natural History |volume=455 |issue=1 |pages=1–76 |doi=10.1206/0003-0090.455.1.1 |issn=0003-0090}}</ref><ref>{{Cite web |last=Mammal Diversity |date=2023-04-15 |title=Mammal Diversity Database |url=https://zenodo.org/records/7830771 |access-date=2023-12-11 |doi=10.5281/zenodo.7830771}}</ref><ref>{{Cite web|last=McClure|first=Sonny R.|title=New opossum species named after UWO biologist Greg Adler|url=https://www.abigailgroff.com/new-opossum-species-named-after-uwo-biologist-greg-adler/|access-date=2021-12-13|website=www.abigailgroff.com|date=8 December 2021 |language=en-US}}</ref>

* '''Family Didelphidae'''
** Subfamily [[Glironia|Glironiinae]]
*** Genus ''[[Glironia]]''
**** [[Bushy-tailed opossum]] (''Glironia venusta'')
** Subfamily [[Caluromyinae]]
*** Genus ''[[Caluromys]]'' [[File:Cuíca-lanosa.jpg|thumb|[[Bare-tailed woolly opossum]], ''Caluromys philander'']][[File:Central American woolly opossum (Caluromys derbianus) male.jpg|thumb|[[Derby's woolly opossum]], ''Caluromys derbianus'']]
**** Subgenus ''Caluromys''
***** [[Bare-tailed woolly opossum]] (''Caluromys philander'')
**** Subgenus ''Mallodelphys''
***** [[Derby's woolly opossum]] (''Caluromys derbianus'')
***** [[Brown-eared woolly opossum]] (''Caluromys lanatus'')
*** Genus ''[[Caluromysiops]]''
**** [[Black-shouldered opossum]] (''Caluromysiops irrupta'')
** Subfamily [[Hyladelphinae]]
*** Genus ''[[Hyladelphys]]''
**** [[Kalinowski's mouse opossum]] (''Hyladelphys kalinowskii'')
*** Genus †''[[Sairadelphys]]'' <small>Oliveira et al. 2011</small>
**** †''Sairadelphys tocantinensis'' <small>Oliveira et al. 2011</small>
** Subfamily [[Didelphinae]]
*** Tribe [[Metachirini]] [[File:Vieraugen-Opossum (Metachirus nudicaudatus).jpg|thumb|[[Brown four-eyed opossum]], ''Metachirus nudicaudatus'']]
**** Genus ''[[Metachirus]]''
***** [[Aritana's brown four-eyed opossum]] (''Metachirus aritanai'')
*****[[Common brown four-eyed opossum]] (''Metachirus myosuros'')
*****[[Brown four-eyed opossum|Guianan brown four-eyed opossum]] (''Metachirus nudicaudatus'')
*** Tribe Didelphini [[File:Schwimmbeutler-drawing2.jpg|thumb|[[Water opossum]], ''Chironectes minimus'']]
**** Genus ''[[Chironectes]]''
***** [[Water opossum]] or [[Water opossum|yapok]] (''Chironectes minimus'')
**** Genus ''[[Lutreolina]]''
***** †''[[Lutreolina biforata]]'' <small>(Ameghino 1904) Goin & Pardiñas 1996</small><ref name="hyperdidelphys">{{cite journal| title=Revision de las especies del genero ''Hyperdidelphys'' Ameghino, 1904 (Mammalia, Marsupialia, Didelphidae. Su significacion filogenetica, estratigrafica y adaptativa en el Neogeno del Cono Sur sudamericano|first=Francisco J.|last=Goin|author2=Pardinas, Ulyses F. J. |journal=[[Estudios Geológicos]]|year=1996|volume=52|issue=5–6|pages=327–359|doi=10.3989/egeol.96525-6275|doi-access=free}}</ref>
***** [[Big lutrine opossum]] or little water opossum (''Lutreolina crassicaudata'')[[File:Cambridge Natural History Mammalia Fig 084.jpg|thumb|[[Big lutrine opossum]], ''Lutreolina crassicaudata'']]
***** †''[[Lutreolina materdei]]'' <small>Goin & De los Reyes 2011</small><ref>{{cite journal| title=Contribution to the knowledge of living representatives of the genus ''Lutreolina'' Thomas, 1910 (Mammalia, Marsupialia, Didelphidae)|jstor=20627135|first=Francisco J.|last=Goin|author2=de los Reyes, Martin |journal=[[Historia Natural]]|year=2011|volume=1|issue=2|pages=15–25}}</ref>
***** [[Massoia's lutrine opossum]] (''Lutreolina massoia'')<ref>{{cite journal|doi=10.1644/13-MAMM-A-246|title= A new species of lutrine opossum, genus ''Lutreolina'' Thomas (Didelphidae), from the South American Yungas|journal= Journal of Mammalogy|volume= 95|issue= 2|pages= 225|year= 2014|last1= Martínez-Lanfranco|first1= Juan A.|last2= Flores|first2= David|last3= Jayat|first3= J. Pablo|last4= d'Elía|first4= Guillermo|s2cid= 85599660|doi-access= free|hdl= 11336/29722|hdl-access= free}}</ref>
***** †''[[Lutreolina tracheia]]'' <small>Rovereto 1914</small>
**** †Genus ''[[Hyperdidelphys]]'' <small>Ameghino 1904</small>
***** †''[[Hyperdidelphys dimartinoi]]'' <small>Goin & Pardiñas 1996</small><ref name="hyperdidelphys" />
***** †''[[Hyperdidelphys inexpectata]]'' <small>(Ameghino 1889) Marshall 1982</small><ref name="hyperdidelphys" />
***** †''[[Hyperdidelphys parvula]]'' <small>Ameghino 1904</small><ref name="hyperdidelphys" />
***** †''[[Hyperdidelphys pattersoni]]'' <small>(Reig 1952) Marshall 1982</small><ref name="hyperdidelphys" />
**** Genus ''[[Didelphis]]'' [[File:Didelphis albiventris, Bahia, Brazil.jpg|thumb|[[White-eared opossum]], ''Didelphis albiventris'']][[File:Didelphis aurita photo-Christian Roger Dockhorn.JPG|thumb|[[Big-eared opossum]], ''Didelphis aurita'']][[File:Rabipelao2.jpg|thumb|[[Common opossum]], ''Didelphis marsupialis'']][[File:Didelphis pernigra-crop.jpg|thumb|[[Andean white-eared opossum]], ''Didelphis pernigra'']]
***** [[White-eared opossum]] (''Didelphis albiventris'')
***** [[Big-eared opossum]] (''Didelphis aurita'')
***** [[Guianan white-eared opossum]] (''Didelphis imperfecta'')
***** [[Common opossum]] (''Didelphis marsupialis'')
***** [[Andean white-eared opossum]] (''Didelphis pernigra'')
***** †''Didelphis solimoensis''<ref>{{cite journal|title=The oldest species of ''Didelphis'' (Mammalia, Marsupialia, Didelphidae) from the late Miocene of Amazonia|first=Mario A.|last=Cozzuol|author2=Goin, Francisco J. |author3=de los Reyes, Martin |author4=Ranzi, Alceu |journal=[[Journal of Mammalogy]]|year=2006|volume=87|issue=4|pages=663–667|doi=10.1644/05-MAMM-A-282R2.1|s2cid=85646145|doi-access=free}}</ref>
***** [[Virginia opossum]] (''Didelphis virginiana'')
**** Genus ''[[Gray and black four-eyed opossum|Philander]]'' [[File:Cuica verdadeira2.jpg|thumb|[[Gray four-eyed opossum]], ''Philander opossum'']]
***** [[Anderson's four-eyed opossum]] (''Philander andersoni'')
***** [[Common four-eyed opossum]] (''Philander canus'')
***** [[Deltaic four-eyed opossum]] (''Philander deltae'')
***** [[Southeastern four-eyed opossum]] (''Philander frenatus'')<!--no longer recognized. Synonym of Philander nigratus-->
***** [[McIlhenny's four-eyed opossum]] (''Philander mcilhennyi'')
***** [[Dark four-eyed opossum]] (''Philander melanurus'')
***** [[Mondolfi's four-eyed opossum]] (''Philander mondolfii'') <!-- No longer recognized. Synonym of Philander canus  -->
***** [[Black four-eyed opossum]] (''Philander nigratus'')
***** [[Olrog's four-eyed opossum]] (''Philander olrogi'')<!--No longer recognized. Synonym of Philander canus -->
***** [[Gray four-eyed opossum]] (''Philander opossum'')
***** [[Pebas four-eyed opossum]] (''Philander pebas'')
***** [[Southern four-eyed opossum]] (''Philander quica'')
***** [[Northern four-eyed opossum]] (''Philander vossi'')
**** †Genus ''[[Thylophorops]]'' <small>Reig 1952</small>
***** †''[[Thylophorops chapadmalensis]]'' <small>Reig 1952</small><ref name="hyperdidelphys" />
***** †''[[Thylophorops lorenzinii]]'' <small>Goin et al. 2009</small><ref name="Goin 2009 35–46" />
***** †''[[Thylophorops perplana]]'' <small>(Ameghino 1904) Goin & Pardiñas 1996</small><ref name="hyperdidelphys" />
*** Tribe Marmosini
**** Genus †''[[Hesperocynus]]'' <small>Forasiepi et al. 2009</small>
***** †''[[Hesperocynus dolgopolae]]'' <small>(Reig 1952) Forasiepi et al. 2009</small>
**** Genus ''[[Marmosa]]''
***** †''Marmosa contrerasi'' <small>Mones 1980</small>
***** Subgenus ''Eomarmosa''
****** [[Red mouse opossum]] (''Marmosa rubra'')
***** Subgenus ''Exulomarmosa''
****** [[Isthmian mouse opossum]] (''Marmosa isthmica'')
****** [[Mexican mouse opossum]] (''Marmosa mexicana'')
****** [[Robinson's mouse opossum]] (''Marmosa robinsoni'')
****** [[Simon's mouse opossum]] (''Marmosa simonsi'')
****** [[Guajira mouse opossum]] (''Marmosa xerophila'')
****** [[Zeledon's mouse opossum]] (''Marmosa zeledoni'')
***** Subgenus ''Marmosa'' [[File:Marmosa robinsoni.jpg|thumb|[[Robinson's mouse opossum]], ''Marmosa robinsoni'']]
****** [[Quechuan mouse opossum]] (''Marmosa macrotarsus'')
****** [[Linnaeus's mouse opossum]] (''Marmosa murina'')
****** [[Tyler's mouse opossum]] (''Marmosa tyleriana'')
****** [[Waterhouse's mouse opossum]] (''Marmosa waterhousei'')
***** Subgenus ''Micoureus'' [[File:Cuíca - Marmosa paraguayana cropped.jpg|thumb|[[Tate's woolly mouse opossum]], ''Marmosa paraguayanus'']]
****** [[Adler's mouse opossum]] (''Marmosa adleri)''
****** [[Alston's mouse opossum|Alston's woolly mouse opossum]] (''Marmosa alstoni'')
****** [[White-bellied woolly mouse opossum]] (''Marmosa constantiae'')
****** [[Woolly mouse opossum|Northeastern woolly mouse opossum]] (''Marmosa demerarae'')
****** [[Northwestern woolly mouse opossum]] (''Marmosa germana'')
****** [[Jansa's woolly mouse opossum]] (''Marmosa jansae'')
******†''[[Marmosa laventica]]'' <small>Marshall 1976</small><ref name="goin">{{cite book|last1=Goin|first1=Francisco J.|title=Vertebrate Paleontology of the Miocene in Colombia. A History of the Neotropical Fauna|publisher=Smithsonian Institution Scholarly Press|year=1997|isbn=978-1-56098-418-4|pages=185–204|chapter=New clues for understanding Neogene marsupial radiations}}</ref>
****** [[Brazilian woolly mouse opossum]] (''Marmosa limae'')<!-- No longer recognized. Synonym of Marmosa demerarae --> 
****** [[Merida woolly mouse opossum]] (''Marmosa meridae'')<!-- No longer recognized. Synonym of Marmosa demerarae -->
****** [[Nicaraguan woolly mouse opossum]] (''Marmosa nicaraguae'')
****** [[Tate's woolly mouse opossum]] (''Marmosa paraguayana'')
****** [[Peruvian woolly mouse opossum]] (''Marmosa parda'')
****** [[Anthony's woolly mouse opossum]] (''Marmosa perplexa'')
****** [[Little woolly mouse opossum]] (''Marmosa phaea'')
****** [[Bolivian woolly mouse opossum]] (''Marmosa rapposa'')
****** [[Bare-tailed woolly mouse opossum]] (''Marmosa rutteri'')
***** Subgenus ''Stegomarmosa''
****** [[Heavy-browed mouse opossum]] (''Marmosa andersoni'')
****** [[Rufous mouse opossum]] (''Marmosa lepida'')
**** Genus ''[[Monodelphis]]'' [[File:Monodelphis dimidiata.jpg|thumb|[[Yellow-sided opossum]], ''Monodelphis dimidiata'']][[File:Monodelphis domestica93-300b.jpg|thumb|[[Gray short-tailed opossum]], ''Monodelphis domestica'']]
***** Subgenus ''Microdelphys''
****** [[Northern three-striped opossum]] (''Monodelphis americana'')
****** [[Gardner's short-tailed opossum]] (''Monodelphis gardneri'')
****** [[Ihering's three-striped opossum]] (''Monodelphis iheringi'')
****** [[Chestnut-striped opossum]] (''Monodelphis rubida'')<!-- No longer recognized. Synonym of Monodelphis americana -->
****** [[Long-nosed short-tailed opossum]] (''Monodelphis scalops'')
****** [[Southern three-striped opossum]] (''Monodelphis theresa'')<!-- No longer recognized. Synonym of Monodelphis scalops -->
****** [[Red three-striped opossum]] (''Monodelphis umbristriata'')<!-- No longer recognized. Synonym of Monodelphis americana -->
***** Subgenus ''Monodelphiops''
****** [[Yellow-sided opossum]] (''Monodelphis dimidiata'')
****** [[Southern red-sided opossum]] (''Monodelphis sorex'')<!-- No longer recognized. Synonym of Monodelphis dimidiata -->
****** [[One-striped opossum]] (''Monodelphis unistriata'')
***** Subgenus ''Monodelphis''
****** [[Arlindo's short-tailed opossum]] (''Monodelphis arlindoi'')<ref name="wiley1">{{cite journal |last1=Pavan |first1=Silvia Eliza |last2=Rossi |first2=Rogerio Vieira |last3=Schneider |first3=Horacio |year=2012 |title=Species diversity in the ''Monodelphis brevicaudata'' complex (Didelphimorphia: Didelphidae) inferred from molecular and morphological data, with the description of a new species |journal=Zoological Journal of the Linnean Society |volume=165 |pages=190–223 |doi=10.1111/j.1096-3642.2011.00791.x |doi-access=free}}</ref>
****** [[Northern red-sided opossum]] (''Monodelphis brevicaudata'')
****** [[Gray short-tailed opossum]] (''Monodelphis domestica'')
****** [[Amazonian red-sided opossum]] (''Monodelphis glirina'')
****** [[Marajó short-tailed opossum]] (''Monodelphis maraxina'')<!-- No longer recognized. Synonym of Monodelphis glirina -->
****** [[Hooded red-sided opossum]] (''Monodelphis palliolata'')
****** [[Santa Rosa short-tailed opossum]] (''Monodelphis sanctaerosae'')<ref name="Voss-2012">{{cite journal |last1=Voss |first1=Robert S. |last2=Pine |first2=Ronald H. |last3=Solari |first3=Sergio |year=2012 |title=A New Species of the Didelphid Marsupial Genus ''Monodelphis'' from Eastern Bolivia |url=https://zenodo.org/record/5360285 |journal=American Museum Novitates |issue=3740 |pages=1–14 |doi=10.1206/3740.2 |s2cid=83545414}}</ref>
****** [[Touan short-tailed opossum]] (''Monodelphis touan'')<ref name="wiley1" />
****** [[Voss's short-tailed opossum]] (''Monodelphis vossi'')
***** Subgenus ''Mygalodelphys''
****** [[Sepia short-tailed opossum]] (''Monodelphis adusta'')<ref name="wiley1" />
****** [[Handley's short-tailed opossum]] (''Monodelphis handleyi'')<ref>Solari, S. (2016). ''Monodelphis handleyi''. The IUCN Red List of Threatened Species {{doi|10.2305/IUCN.UK.2016-3.RLTS.T199833A22171921.en}}</ref>
****** [[Pygmy short-tailed opossum]] (''Monodelphis kunsi'')
****** [[Osgood's short-tailed opossum]] (''Monodelphis osgoodi'')
****** [[Peruvian short-tailed opossum]] (''Monodelphis peruviana'')
****** [[Monodelphis pinocchio|Long-nosed short-tailed opossum]] (''Monodelphis pinocchio'')
****** [[Reig's opossum]] ''(Monodelphis reigi)''
****** [[Ronald's opossum]] (''Monodelphis ronaldi'')
****** [[Saci short-tailed opossum]] (''Monodelphis saci'')<ref name="Voss-2012" />
***** Subgenus ''Pyrodelphys''
****** [[Emilia's short-tailed opossum]] (''Monodelphis emiliae'')
**** Genus †''[[Sparassocynus]]'' <small>Mercerat 1898</small><ref name =BeckTaglioretti>{{cite journal |last1=Beck |first1=Robin M. D. |last2=Taglioretti |first2=Matias L. |title=A Nearly Complete Juvenile Skull of the Marsupial ''Sparassocynus derivatus'' from the Pliocene of Argentina, the Affinities of "Sparassocynids", and the Diversification of Opossums (Marsupialia; Didelphimorphia; Didelphidae) |journal=Journal of Mammalian Evolution |date=2019 |volume=27 |issue=3 |pages=385–417 |doi=10.1007/s10914-019-09471-y|s2cid=198190603 |doi-access=free }}</ref>
***** †''[[Sparassocynus bahiai]]'' <small>Mercerat 1898</small>
***** †''[[Sparassocynus derivatus]]'' <small>Reig & Simpson 1972</small>
***** †''[[Sparassocynus maimarai]]'' <small>Abello et al. 2015</small>
***** †''[[Sparassocynus heterotopicus]]'' <small>Villarroel & Marshall 1983</small>
**** Genus †''[[Thylatheridium]]'' <small>Reig 1952</small>
***** †''[[Thylatheridium cristatum]]'' <small>Reig 1952</small>
***** †''[[Thylatheridium hudsoni]]'' <small>Goin & Montalvo 1988</small>
***** †''[[Thylatheridium pascuali]]'' <small>Reig 1958</small>
**** Genus ''[[Tlacuatzin]]''<ref name="VossJansa2009">{{cite journal |last=Voss |first=Robert S. |author2=Jansa, Sharon A. |year=2009 |title=Phylogenetic relationships and classification of didelphid marsupials, an extant radiation of New World metatherian mammals |journal=[[Bulletin of the American Museum of Natural History]] |volume=322 |pages=1–177 |doi=10.1206/322.1 |s2cid=85017821 |hdl-access=free |hdl=2246/5975}}</ref>
***** [[Balsas gray mouse opossum]] (''Tlacuatzin balsasensis'')
***** [[Grayish mouse opossum|Tehuantepec gray mouse opossum]] (''Tlacuatzin canescens'')
***** [[Yucatan gray mouse opossum]] (''Tlacuatzin gaumeri'')
***** [[Tres Marías gray mouse opossum]] (''Tlacuatzin insularis'')
***** [[Northern gray mouse opossum]] (''Tlacuatzin sinaloae'')
**** †Genus ''[[Zygolestes]]'' <small>Ameghino 1898</small>
***** †''[[Zygolestes paramensis]]'' <small>Ameghino 1898</small>
***** †''[[Zygolestes tatei]]'' <small>Goin, Montalvo & Visconti 2000</small>
*** Tribe Thylamyini
**** Genus ''[[Chacodelphys]]''
***** [[Chacoan pygmy opossum]] (''Chacodelphys formosa'')
**** Genus ''[[Cryptonanus]]''
***** [[Agricola's gracile opossum]] (''Cryptonanus agricolai'')
***** [[Chacoan gracile opossum]] (''Cryptonanus chacoensis'')
***** [[Guahiba gracile opossum]] (''Cryptonanus guahybae'')
***** †[[Red-bellied gracile opossum]] (''Cryptonanus ignitus'')<!--No longer recognized. Synonym of Cryptonanus chacoensis-->
***** [[Unduavi gracile opossum]] (''Cryptonanus unduaviensis'')
**** Genus ''[[Gracilinanus]]''
***** [[Aceramarca gracile opossum]] (''Gracilinanus aceramarcae'')
***** [[Agile gracile opossum]] (''Gracilinanus agilis'')
***** [[Wood sprite gracile opossum]] (''Gracilinanus dryas'')
***** [[Emilia's gracile opossum]] (''Gracilinanus emilae'')
***** [[Northern gracile opossum]] (''Gracilinanus marica'')
***** [[Brazilian gracile opossum]] (''Gracilinanus microtarsus'')
***** [[Peruvian opossum]] (''Gracilinanus peruanus'')
**** Genus ''[[Lestodelphys]]''
***** [[Patagonian opossum]] (''Lestodelphys halli'')
***** †''Lestodelphys juga'' <small>(Ameghino 1889)</small>
**** Genus ''[[Marmosops]]'' [[File:Marmosops incanus.jpg|thumb|[[Gray slender opossum]], ''Marmosops incanus'']]
***** Subgenus ''Marmosops''
****** [[Tschudi's slender opossum]] (''Marmosops caucae'')
****** [[Creighton's slender opossum]] (''Marmosops creightoni'')
****** [[Dorothy's slender opossum]] (''Marmosops dorothea'')<!-- No longer recognized. Synonym of Marmosops noctivagus -->
****** [[Andean slender mouse opossum]] (''Marmosops impavidus'')<!-- No longer recognized. Synonym of Marmosops caucae -->
****** [[Gray slender opossum]] (''Marmosops incanus'')
****** [[Neblina slender opossum]] (''Marmosops neblina'')<!-- No longer recognized. Synonym of Marmosops caucae -->
****** [[White-bellied slender opossum]] (''Marmosops noctivagus'')
****** [[Spectacled slender opossum]] (''Marmosops ocellatus'')
****** [[Brazilian slender opossum]] (''Marmosops paulensis'')
****** [[Soini's slender opossum]] (''Marmosops soinii'')
***** Subgenus ''Sciophanes''
****** [[Bishop's slender opossum]] (''Marmosops bishopi'')
****** [[Carr's slender opossum]] (''Marmosops carri'')
****** [[Cordillera slender opossum]] (''Marmosops chucha'')
****** [[Narrow-headed slender opossum]] (''Marmosops cracens'')<!-- No longer recognized. Synonym of Marmosops fuscatus -->
****** [[Dusky slender opossum]] (''Marmosops fuscatus'')
****** [[Handley's slender opossum]] (''Marmosops handleyi'')
****** [[Panama slender opossum]] (''Marmosops invictus'')
****** [[Junin slender opossum]] (''Marmosops juninensis'')
****** [[Río Magdalena slender opossum]] (''Marmosops magdalenae'')
****** [[Silva's slender opossum]] (''Marmosops marina'')
****** [[Ojasti's slender opossum]] (''Marmosops ojastii'')
****** [[Pantepui slender opossum]] (''Marmosops pakaraimae'')
****** [[Delicate slender opossum]] (''Marmosops parvidens'')
****** [[Pinheiro's slender opossum]] (''Marmosops pinheiroi'')
****** [[Woodall's slender opossum]] (''Marmosops woodalli'')
**** Genus ''[[Thylamys]]'' <!--[https://translate.google.com/translate?hl=en&sl=sp&u=[[:es:Thylamys]] translation of Spanish article]--> [[File:Llaca.jpg|thumb|[[Elegant fat-tailed mouse opossum]], ''Thylamys elegans'']]
***** Subgenus ''Thylamys''
****** [[Cinderella fat-tailed mouse opossum]] (''Thylamys cinderella'')<!-- No longer recognized. Synonym of Thylamys venustus  -->
****** [[Mesopotamian fat-tailed mouse opossum]] (''Thylamys citellus'')<ref>Flores, D. & Teta, P. (2016). ''Thylamys citellus''. The IUCN Red List of Threatened Species {{doi|10.2305/IUCN.UK.2016-2.RLTS.T199835A22172943.en}}</ref><!-- No longer recognized. Synonym of Thylamys pusillus  -->
****** [[Elegant fat-tailed mouse opossum]] (''Thylamys elegans'')
****** [[Paraguayan fat-tailed mouse opossum]] (''Thylamys macrurus'')
****** [[White-bellied fat-tailed mouse opossum]] (''Thylamys pallidior'')
****** [[Dry Chaco fat-tailed mouse opossum]] (''Thylamys pulchellus'')<ref>Flores, D. & Teta, P. (2016). ''Thylamys pulchellus''. The IUCN Red List of Threatened Species {{doi|10.2305/IUCN.UK.2016-2.RLTS.T199834A22172571.en}}</ref><!-- No longer recognized. Synonym of Thylamys pusillus  -->
****** [[Common fat-tailed mouse opossum|Chacoan fat-tailed mouse opossum]] (''Thylamys pusillus'')
****** [[Argentine fat-tailed mouse opossum]] (''Thylamys sponsorius'')
****** [[Tate's fat-tailed mouse opossum]] (''Thylamys tatei'')
****** [[Buff-bellied fat-tailed mouse opossum]] (''Thylamys venustus'')
***** Subgenus ''Xerodelpys''
****** [[Karimi's fat-tailed mouse opossum]] (''Thylamys karimii'')
****** [[Dwarf fat-tailed mouse opossum]] (''Thylamys velutinus'')
***** †''[[Thylamys colombianus]]'' <small>Goin 1997</small><ref name="goin" />
***** †''[[Thylamys minutus]]'' <small>Goin 1997</small><ref name="goin" />
***** †''[[Thylamys pinei]]'' <small>Goin, Montalvo & Visconti 2000</small><ref>{{cite journal|title=Los marsupiales (Mammalia) del Mioceno Superior de la Formacion Cerro Azul (Provincia de La Pampa, Argentina) |first1=Francisco J. |last1=Goin |author2=Montalvo, C.I. |author3=Visconti, G. |journal=[[Estudios Geológicos]]|year=2000|volume=56|issue=1–2 |pages=101–126|doi=10.3989/egeol.00561-2158|doi-access=free |hdl=11336/108700 |hdl-access=free }}</ref>
***** †''[[Thylamys zettii]]'' <small>Goin 1997</small><ref>{{cite journal|title=''Thylamys zettii'', nueva especie de marmosino (Marsupialia, Didelphidae) del Cenozoico tardio de la region Pampeana|first=Francisco J.|last=Goin|journal=[[Ameghiniana]]|year=1997|volume=34|issue=4|pages=481–484}}</ref>