NATURAL HISTORY · CATALOGUE RECORD
Panama Mouse Opossum
Marmosa (Exulomarmosa) isthmica Goldman, 1912
Source-backed taxonomic record
Accepted species in Catalogue of Life’s 11 September 2026 base release. This preserves the source classification and available supporting data; it is not a completed species monograph.
Open encyclopedia reference
The Isthmian mouse opossum (Marmosa isthmica) is a species of opossum in the family Didelphidae found in Colombia, Ecuador, and Panama.
Foraging along branches and vines for fruit and insects, with the help of a prehensile tail, M. isthmica was formerly considered a subspecies of Robinson's mouse opossum (Marmosa robinsoni) and is supposed to be similar to it in habit, but following Rossi (2005) it is now deemed a species.
In 1935 in the Panama Canal Zone, Enders observed Marmosa isthmica to build nests with leaves in a nestbox fixed to a tree.
Wikipedia contributors, Isthmian mouse opossum; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T08:42:17.787311+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Marmosa (Exulomarmosa) isthmica Goldman, 1912
- Name authority
- Goldman, 1912
- Common name
- Panama Mouse Opossum
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Mammalia
- Order
- Didelphimorphia
- Family
- Didelphidae
- Genus
- Marmosa
- Extinction status
- Recorded extant
Classification family tree
Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.
- domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
- kingdomAnimalia
- phylumChordata
- subphylumVertebrata
- infraphylumGnathostomata
- parvphylumOsteichthyes
- megaclassTetrapoda
- classMammalia Linnaeus, 1758
- subclassTheria Parker & Haswell, 1897
- infraclassMetatheria Huxley, 1880
- orderDidelphimorphia Gill, 1872
- familyDidelphidae Gray, 1821
- subfamilyDidelphinae Gray, 1821
- tribeMarmosini Hershkovitz, 1992
- genusMarmosa Gray, 1821
- subgenusExulomarmosa Voss, Gutiérrez, Solari, Rossi & Jansa, 2014
- speciesMarmosa (Exulomarmosa) isthmica Goldman, 1912
Close classified relatives
These entries share the source’s genus, Marmosa. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Linnaeus's Mouse OpossumMarmosa (Exulomarmosa) murina (Linnaeus, 1758) | DidelphidaeChordata | Accepted speciesRecorded extant |
| Red Mouse OpossumMarmosa (Eomarmosa) rubra Tate, 1931 | DidelphidaeChordata | Accepted speciesRecorded extant |
| Dryland Mouse OpossumMarmosa (Exulomarmosa) xerophila Handley & Gordon, 1979 | DidelphidaeChordata | Accepted speciesRecorded extant |
| Zeledon's Mouse OpossumMarmosa (Exulomarmosa) zeledoni Goldman, 1911 | DidelphidaeChordata | Accepted speciesRecorded extant |
| Waterhouse's Mouse OpossumMarmosa (Marmosa) waterhousii Tomes, 1860 | DidelphidaeChordata | Accepted speciesRecorded extant |
| Bare-tailed Woolly Mouse OpossumMarmosa (Micoureus) rutteri Thomas, 1924 | DidelphidaeChordata | Accepted speciesRecorded extant |
| Little Woolly Mouse OpossumMarmosa (Micoureus) phaea Thomas, 1899 | DidelphidaeChordata | Accepted speciesRecorded extant |
| North-eastern Woolly Mouse OpossumMarmosa (Micoureus) demerarae Thomas, 1905 | DidelphidaeChordata | Accepted speciesRecorded extant |
| Anderson's Mouse OpossumMarmosa (Stegomarmosa) andersoni Pine, 1972 | DidelphidaeChordata | Accepted speciesRecorded extant |
| Mexican Mouse OpossumMarmosa (Exulomarmosa) mexicana Merriam, 1897 | DidelphidaeChordata | Accepted speciesRecorded extant |
| Robinson's Mouse OpossumMarmosa (Exulomarmosa) robinsoni Bangs, 1898 | DidelphidaeChordata | Accepted speciesRecorded extant |
| Tyleria Mouse OpossumMarmosa (Marmosa) tyleriana Tate, 1931 | DidelphidaeChordata | Accepted speciesRecorded extant |
Names & synonyms
Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.
| Recorded name | Source status |
|---|---|
| Marmosa robinsoni isthmica Goldman, 1912 Goldman, 1912 | synonym |
Documented distribution
Source distribution statements, not a complete range map. A listed locality is not necessarily a place of origin.
South America
Source literature & publication evidence
References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.
- https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=1255398 Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references
Origins, evidence & remaining research
Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.
Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record. A suitable sourced image remains to be added.
Dataset citation & attribution
This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11
Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.
Stable key: col:DDFRC. Classification follows source parent identifiers. English common names may vary by region.