Didelphidae
Opossums are members of the marsupial order Didelphimorphia endemic to the Americas. The largest order of marsupials in the Western Hemisphere, it comprises 126 species in 18 genera. Opossums originated in South America and entered North America in the Great American Interchange following the connection of North and South America in the late Cenozoic.
Specialjake · CC BY-SA 3.0 · via Wikipedia/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.
On record
Recorded, not inferred- Also called
- opossumPBDB
- Sits inside
- DidelphimorphiaPBDB
- Diet
- omnivore, carnivorePBDB
- Life habit
- scansorialPBDB
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB
Time the record covers
At least 72 million years on record.
The record covers at least 72.2 Mya to 11.7 ka. No occurrence read is dated outside 83.6 Mya to 0 Mya.
362 occurrences of Didelphidae on record, most of them in the Pleistocene. The Paleobiology Database records this as a living group. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.
When
362 occurrences- Late Cretaceousunder 1%
- Paleocene2%
- Eocene11%
- Oligocene3%
- Miocene22%
- Pliocene22%
- Pleistocene26%
- Holocene15%
These are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.
Found in
76 formations
- Chapadmalal Formation28
- Cerro Azul Formation28
- Monte Hermoso Formation21
- Villavieja Formation · Honda Group16
- White River Formation7
- Irene Formation7
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The named rock units Didelphidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 52 further formations hold fewer occurrences each and are not listed. 140 occurrences have no formation on record, which is common for older literature.
Didelphidae and its relatives
PleistoceneWhere Didelphidae and its relatives were recorded in the Pleistocene.
Found in the same rock
2,809 taxa- Didelphis virginiana32 sites
- Odocoileus virginianus31 sites
- Procyon lotor25 sites
- Equus22 sites
- Sylvilagus floridanus22 sites
- Mammut americanum19 sites
- Panthera onca19 sites
- Sigmodon hispidus19 sites
- Aenocyon dirus17 sites
- Holmesina septentrionalis17 sites
- Dasypus bellus16 sites
- Meleagris gallopavo16 sites
- Neofiber alleni16 sites
- Scalopus aquaticus16 sites
- Ursus americanus16 sites
- Lynx rufus15 sites
- Neotoma floridana15 sites
- Oryzomys palustris15 sites
- Castor canadensis14 sites
- Didelphis14 sites
- Mephitis mephitis14 sites
- Tapirus (Helicotapirus) veroensis14 sites
- Urocyon cinereoargenteus14 sites
- Lontra canadensis13 sites
The Paleobiology Database records 214 sites for Didelphidae, and this reads all of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.
This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.
Entered from
133 references- Synonymies and reidentifications of North American fossil mammals35
- New clues for understanding Neogene marsupial radiation19
- Revisión de las especies del Género Hyperdidelphys Ameghino, 1904 (Mammalia, Marsupialia, Didelphidae). Su significación filogenética, estratigráfica y adaptativa en el Neógeno del Cono Sur Sudamericano.17
- Fauna de mamíferos do Quaternário de Serra da Mesa (Goiás, Brasil)14
- Reassesment of the Pliocene-Pleistocene continental time scale of Southern South America. Correlation of the type Chapadmalalan with Bolivian sections12
- Didelphidae from the Chapadmalal formation in the Museo Municipal de Ciencias Naturales of Mar del Plata12
- Los marsupiales (Mammalia) del Mioceno Superior de la Formacion Cerro Azul(Provincia de La Pampa, Argentina)11
- Late Cenozoic vertebrates from the Southern Pampean region: systematic and bio-chronostratigraphic update9
- Central Amazonian Forests and the Minimum Crtical Size of Ecosystems Project9
- An Overview of Research at Cocha Cashu Biological Station7
- Biostratigraphy and biochronology of the Monte Hermoso Formation (early Pliocene) at its type locality, Buenos Aires Province, Argentina6
- Quaternary mammals from Serra do Bodoquena, Mato Grosso do Sul, Brazil6
Each of the 362 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. 121 further references are not listed. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content2
Picture of Didelphidae
- Source
- Wikipedia/Commons
- Credit
- Specialjake
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
CT scan
- Source
- MorphoSource
- Licence
- In Copyright
- Commercial use
- cannot be read from the licence given — check the record
- Specimen
- Didelphidae indet. · University of Colorado Museum of Natural History (UCM):Vertebrate:103091
The description on this site
- Source
- Wikipedia, “Opossum”
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itDidelphimorphia through timeFormations of the PleistoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Gray 1821)