Arctoidea
Arctoidea is an infraorder of mostly carnivorous mammals which include the extinct Hemicyonidae (dog-bears), and the extant Musteloidea, Pinnipedia, and Ursidae (bears), found in all continents from the Eocene, 46 million years ago, to the present. The oldest group of the clade is the bears, as their CMAH gene is still intact. The gene became non-functional in the common ancestor of the Mustelida. Arctoids are caniforms, along with dogs (canids) and extinct bear dogs (Amphicyonidae). The earliest caniforms were superficially similar to martens, which are tree-dwelling mustelids. Together with feliforms, caniforms compose the order Carnivora; sometimes Arctoidea can be considered a separate suborder from Caniformia and a sister taxon to Feliformia.

derivative work: user:The Explaner · CC BY-SA 4.0 · 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- Sits inside
- CanoideaPBDB
- Diet
- carnivore, omnivorePBDB, for Carnivora
- Life habit
- ground dwellingPBDB, for Carnivora
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Eutheria
Time the record covers
At least 37 million years on record.
The record covers at least 37.71 Mya to 11.7 ka. No occurrence read is dated outside 41.03 Mya to 0 Mya.
5,215 occurrences of Arctoidea 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
5,215 occurrencesThese 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
492 formations
- Glenns Ferry Formation90
- Monterey Formation47
- Valentine Formation · Ogallala Group44
- Yorktown Formation · Chesapeake Group37
- Calvert Formation · Chesapeake Group36
- Varswater Formation34
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The named rock units Arctoidea has been recovered from, largest first. Drawn where the rock is now, not where it formed. 468 further formations hold fewer occurrences each and are not listed. 3,390 occurrences have no formation on record, which is common for older literature.
Arctoidea and its relatives
PleistoceneWhere Arctoidea and its relatives were recorded in the Pleistocene.
Found in the same rock
2,272 taxa- Camelidae45 sites
- Mustelidae37 sites
- Mylagaulidae34 sites
- Tayassuinae25 sites
- Archaeolaginae22 sites
- Hipparionini22 sites
- Neohipparion eurystyle22 sites
- Tayassuidae21 sites
- Teleoceras21 sites
- Marmotini19 sites
- Pleiolama vera19 sites
- Equidae18 sites
- Hippotherium18 sites
- Rhinocerotidae18 sites
- Aphelops megalodus17 sites
- Borophaginae16 sites
- Epicyon saevus16 sites
- Gomphotheriidae16 sites
- Aelurodon ferox15 sites
- Aphelops15 sites
- Castoridae15 sites
- Eucastor tortus15 sites
- Gomphotherium15 sites
- Leptocyon vafer15 sites
The Paleobiology Database records at least 1,113 sites for Arctoidea, and this reads 240 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
1,536 references- Polar bear fossil and archaeological records from the Pleistocene and Holocene in relation to sea ice extent and open water polynyas113
- Synonymies and reidentifications of North American fossil mammals111
- New information on the natural history, distribution, and skull size of the extinct (?) West Indian monk seal, Monachus tropicalis69
- Morphology and systematics of Miocene Phocinae (Mammalia: Carnivora) from Paratethys and the North Atlantic region66
- Pleistocene vertebrate faunas of Hungary63
- A trans-Holocene archaeological record of Guadalupe fur seals (Arctocephalus townsendi) on the California coast60
- The Carnivora of the Hagerman Local Fauna (Late Pliocene) of Southwestern Idaho60
- Vertebrate biostratigraphy of the Ogallala Group in Nebraska52
- Mittelpleistozane Saugetierfaunen aus Mitteleuropa - der Versuch einer biostratigraphischen Zuordnung47
- A preliminary report on Carnivora from the Ramapithecus locality, Lufeng, Yunnan43
- I giacimenti Quaternari di vertebrati fossili nell'Italia Nord-Orientale40
- Pliocene walruses from the Yorktown Formation of Virginia and North Carolina, and a systematic revision of the North Atlantic Pliocene walruses38
Each of the 5,215 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. 1,524 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 content1
Picture of Arctoidea
- Source
- Wikipedia/Commons
- Credit
- derivative work: user:The Explaner
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
The description on this site
- Source
- Wikipedia, “Arctoidea”
- 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 itCanoidea through timeFormations of the PleistoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Flower 1869)