{{Use dmy dates|date=September 2023}} {{Short description|Genus of marsupials}} {{Automatic taxobox | image = Marmosa robinsoni.jpg | image_caption = Robinson's mouse opossum (''Marmosa robinsoni'') | display_parents = 2 | taxon = Marmosa | authority = [[John Edward Gray|J. E. Gray]], 1821 | type_species = ''[[Marmosa murina|Didelphis marina]]'' | type_species_authority = [[John Edward Gray|J. E. Gray]], 1821<br />(incorrect spelling of ''Didelphis murina'' [[Linnaeus]], [[10th edition of Systema Naturae|1758]]) | subdivision_ranks = Subgenera | subdivision = * ''Eomarmosa'' * ''Exulomarmosa'' * ''Marmosa'' * ''Micoureus'' * ''Stegomarmosa'' }}
The 29 species in the [[genus]] '''''Marmosa''''' are relatively small [[Neotropical realm|Neotropical]] members of the [[Family (taxonomy)|family]] [[Didelphidae]].<ref>{{cite journal|last1=Gutiérrez|first1=EE|last2=Jansa|first2=SA|last3=Voss|first3=RS|title=Molecular systematics of mouse opossums (Didelphidae: Marmosa): assessing species limits using mitochondrial DNA sequences, with comments on phylogenetic relationships and biogeography|journal=American Museum Novitates|date=2010|issue=3692|pages=1–22|doi=10.1206/708.1|hdl=2246/6076|s2cid=52085421|url=https://zenodo.org/records/5359027/files/source.pdf|url-access=}}</ref> This genus is one of three that are known as '''mouse opossums'''. The others are ''[[Thylamys]]'' (the "fat-tailed mouse opossums") and ''[[Tlacuatzin]]'', the grayish mouse opossum. Members of the genus ''[[Marmosops]]'' used to be called "slender mouse opossums", but are now just called "slender opossums". The thirteen members of the ''Marmosa'' subgenus ''Micoureus'', known as '''woolly mouse opossums''', were formerly considered to be a separate genus,<ref name = MSW3b>{{MSW3 Didelphimorphia | id = 10400116 | page =}}</ref> but were moved into ''Marmosa'' in 2009.<ref name = "Voss">{{cite journal | last = Voss | first = R. S. |author2=Jansa, S. A. | 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 | year = 2009 | doi = 10.1206/322.1 | hdl = 2246/5975 | s2cid = 85017821 | hdl-access = free}}</ref><ref name= "Voss2014">{{cite journal |last1=Voss|first1=Robert S|last2=Gutiérrez|first2=Eliécer E|last3=Solari|first3=Sergio|last4=Rossi|first4=Rogerio V|last5=Jansa|first5=Sharon A|title=Phylogenetic relationships of mouse opossums (Didelphidae, Marmosa) with a revised subgeneric classification and notes on sympatric diversity|journal=American Museum Novitates|date=2014|issue=3817|pages=1–27|doi=10.1206/3817.1|hdl=2246/6556|s2cid=52082932|url=https://www.biodiversitylibrary.org/bibliography/168236}}</ref> Based on a comparison of sequences of one mitochondrial and three nuclear genes, three new subgenera, ''Eomarmosa'', ''Exulomarmosa'' and ''Stegomarmosa'', were recognized by Voss ''et al.'' in 2014.<ref name= "Voss2014" /> ''Eomarmosa'' and ''Exulomarmosa'', as well as ''Marmosa'' and ''Micoureus'', are thought to be [[sister taxa]], while ''Stegomarmosa'' is viewed as sister to ''Marmosa'' plus ''Micoureus''. ''Exulomarmosa'' is a mostly trans-Andean (west of the [[Andes]]) clade.<ref name= "Voss2014" />
==Phylogeny== According to Pavan et al (2025), the relations of Marmosa are as follows:<ref>{{cite journal |last1=Pavan |first1=Silvia E. |last2=Abreu |first2=Edson F. |last3=Sánchez-Vendizú |first3=Pamela Y. |last4=Voss |first4=Robert S. |title=A New Species of Marmosa (Mammalia: Didelphimorphia: Didelphidae) from Parque Nacional del Río Abiseo, Peru |journal=[[American Museum Novitates]] |date=19 June 2025 |volume=2025 |issue=4037 |pages=1–20 |doi=10.1206/4037.1 |url=https://bioone.org/journals/american-museum-novitates/volume-2025/issue-4037/4037.1/A-New-Species-of-Marmosa-Mammalia--Didelphimorphia--Didelphidae/10.1206/4037.1.full}}</ref> {{clade | style=font-size:85%; line-height:85%; |label1=''[[Marmosa]]'' |1={{clade |1={{clade |label1=''[[Eomarmosa]]'' |1=''[[Marmosa rubra|M. rubra]]'' |label2=''[[Exulomarmosa]]'' |2={{clade |1=''[[Marmosa simonsi|M. simonsi]]'' |2={{clade |1={{clade |1=''[[Marmosa robinsoni|M. robinsoni]]'' |2=''[[Marmosa xerophila|M. xerophila]]'' }} |2={{clade |1=''[[Marmosa isthmica|M. isthmica]]'' |2={{clade |1=''[[Marmosa mexicana|M. mexicana]]'' |2=''[[Marmosa zeledoni|M. zeledoni]]'' }} }} }} }} }} |2={{clade |label1=''[[Stegomarmosa]]'' |1={{clade |1=''[[Marmosa andersoni|M. andersoni]]'' |2={{clade |1=''[[Marmosa chachapoya|M. chachapoya]]'' |2=''[[Marmosa lepida|M. lepida]]'' }} }} |2={{clade |label1=''[[Marmosa]]'' |1={{clade |1=''[[Marmosa tyleriana|M. tyleriana]]'' |2={{clade |1=''[[Marmosa waterhousei|M. waterhousei]]'' |2={{clade |1=''[[Marmosa murina|M. murina]]'' |2=''[[Marmosa macrotarsus|M. macrotarsus]]'' }} }} }} |label2=''[[Micoureus]]'' |2={{clade |1={{clade |1=''[[Marmosa rapposa|M. rapposa]]'' |2={{clade |1=''[[Marmosa parda|M. parda]]'' |2=''[[Marmosa rutteri|M. rutteri]]'' }} }} |2={{clade |1={{clade |1=''[[Marmosa germana|M. germana]]'' |2={{clade |1=''[[Marmosa nicaraguae|M. nicaraguae]]'' |2={{clade |1=''[[Marmosa adleri|M. adleri]]'' |2=''[[Marmosa alstoni|M. alstoni]]'' }} }} }} |2={{clade |1=''[[Marmosa paraguayana|M. paraguayana]]'' |2={{clade |1={{clade |1=''[[Marmosa perplexa|M. perplexa]]'' |2=''[[Marmosa jansae|M. jansae]]'' }} |2={{clade |1=''[[Marmosa meridae|M. cf. meridae]]'' |2={{clade |1=''[[Marmosa phaea|M. cf. phaea]]'' |2={{clade |1=''[[Marmosa constantiae|M. constantiae]]'' |2=''[[Marmosa demerarae|M. demerarae]]'' }} }} }} }} }} }} }} }} }} }} }}
===Species list=== Subgenus ''Eomarmosa'' <small>[[Robert S. Voss|Voss]], [[Eliecer E. Gutierrez|Gutierrez]], [[Sergio Solari|Solari]], [[Rogerio V. Rossi|Rossi]] & [[Sharon A. Jansa|Jansa]] 2014</small> *''[[Marmosa rubra]]'' <small>[[George Henry Hamilton Tate|Tate]], 1931</small> Subgenus ''Exulomarmosa'' <small>[[Robert S. Voss|Voss]], [[Eliecer E. Gutierrez|Gutierrez]], [[Sergio Solari|Solari]], [[Rogerio V. Rossi|Rossi]] & [[Sharon A. Jansa|Jansa]] 2014</small> *''[[Marmosa isthmica]]'' <small> [[Edward Alphonso Goldman|Goldman]]. 1912</small> *''[[Marmosa mexicana]]'' <small>[[Clinton Hart Merriam|Merriam]], 1897</small> *''[[Marmosa robinsoni]]'' <small>[[Outram Bangs|Bangs]], 1898</small> *''[[Marmosa simonsi]]'' <small>[[Oldfield Thomas|Thomas]], 1899</small> *''[[Marmosa xerophila]]'' <small>[[Charles O. Handley|Handley]] & Gordon, 1979</small> *''[[Marmosa zeledoni]]'' <small>[[Edward Alphonso Goldman|Goldman]], 1911</small> Subgenus ''Marmosa'' <small>[[John Edward Gray|J. E. Gray]] 1821</small> *''[[Marmosa macrotarsus]]'' <small>([[Johann Andreas Wagner|Wagner]], 1842)</small> *''[[Marmosa murina]]'' <small>([[Carl Linnaeus|Linnaeus]], 1758)</small> *''[[Marmosa tyleriana]]'' <small>[[George Henry Hamilton Tate|Tate]] 1931</small> *''[[Marmosa waterhousei]]'' <small>([[Robert Fisher Tomes|Tomes]], 1860)</small> Subgenus ''Micoureus'' <small>[[René-Primevère Lesson|Lesson]] 1842</small> *''[[Marmosa adleri]]''<ref>{{cite web |url=https://digitallibrary.amnh.org/handle/2246/7287 |hdl=2246/7287 |website=digitallibrary.amnh.org |date=8 Dec 2021 |title=A revision of the didelphid marsupial genus Marmosa}}</ref> <small>Voss, Giarla, & Jansa, 2021</small> * ''[[Marmosa alstoni]]'' <small>([[Joel Asaph Allen|J. A. Allen]], 1900)</small> * ''[[Marmosa constantiae]]'' <small>[[Oldfield Thomas|Thomas]], 1900</small> * ''[[Marmosa demerarae]]'' <small>[[Oldfield Thomas|Thomas]], 1905</small> *''[[Marmosa germana]]'' <small>[[Oldfield Thomas|Thomas]], 1904</small> *''[[Marmosa jansae]]'' <small>Voss & Giarla, 2021</small> *''[[Marmosa limae]]'' <small>[[Oldfield Thomas|Thomas]], 1920</small> *''[[Marmosa meridae]]'' <small>[[George Henry Hamilton Tate|Tate]], 1931</small> *''[[Marmosa nicaraguae]]'' <small>[[Oldfield Thomas|Thomas]], 1905</small> * ''[[Marmosa paraguayana]]'' <small>[[George Henry Hamilton Tate|Tate]], 1931</small> *''[[Marmosa parda]]'' <small>[[George Henry Hamilton Tate|Tate]], 1931</small> *''[[Marmosa perplexa]]'' <small>Anthony, 1922 </small> * ''[[Marmosa phaea]]'' <small>[[Oldfield Thomas|Thomas]], 1899</small> *''[[Marmosa rapposa]]'' <small>[[Oldfield Thomas|Thomas]], 1899</small> *''[[Marmosa rutteri]]'' <small>[[Oldfield Thomas|Thomas]], 1924</small> Subgenus ''Stegomarmosa'' <small>[[R.H. Pine|Pine]], 1972</small> *''[[Marmosa andersoni]]'' <small>Pine, 1972</small> *''[[Marmosa chachapoya]]'' <small>Pavan, Abreu, Sánchez-Vendizú and Voss, 2025</small> *''[[Marmosa lepida]]'' <small>([[Oldfield Thomas|Thomas]], 1888)</small>
==References== {{Reflist}}
{{Didelphimorphia|D.}} {{Taxonbar|from=Q244060}}
[[Category:Opossums]] [[Category:Marsupial genera]] [[Category:Taxa named by John Edward Gray]]
{{marsupial-stub}}