Palaeosyops
Palaeosyops is a genus of small brontothere which lived during the early to middle Eocene.

Osborn. · Public Domain · 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
- PalaeosyopinaePBDB
- Diet
- browserPBDB, for Brontotheriidae
- Life habit
- ground dwellingPBDB, for Brontotheriidae
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Eutheria
Time the record covers
At most 11 million years on record.
Every occurrence read is dated to somewhere between 56 Mya and 45.9 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
65 occurrences of Palaeosyops on record, most of them in the Eocene. 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
65 occurrences- Eocene100%
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
7 formations
- Bridger Formation42
- Huerfano Formation8
- Wasatch Formation6
- Aycross Formation4
- Green River Formation2
- Willwood Formation1
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The named rock units Palaeosyops has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.
Palaeosyops and its relatives
EoceneWhere Palaeosyops and its relatives were recorded in the Eocene.
Found in the same rock
274 taxa- Hyrachyus modestus14 sites
- Hyopsodus paulus12 sites
- Hyopsodus minusculus11 sites
- Microsyops elegans9 sites
- Omomys carteri9 sites
- Orohippus pumilus9 sites
- Sciuravus nitidus8 sites
- Smilodectes gracilis8 sites
- Antiacodon pygmaeus7 sites
- Baptemys wyomingensis7 sites
- Hyrachyus7 sites
- Crocodylus affinis6 sites
- Paramys delicatus6 sites
- Smilodectes mcgrewi6 sites
- Viverravus gracilis6 sites
- Anosteira ornata5 sites
- Glyptosaurus sylvestris5 sites
- Helaletes nanus5 sites
- Microsus cuspidatus5 sites
- Sinopa rapax5 sites
- Thinocyon velox5 sites
- Washakius insignis5 sites
- Anaptomorphus westi4 sites
- Baena arenosa4 sites
The Paleobiology Database records 55 sites for Palaeosyops, 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
20 references- Mammalian Fauna From the Lower Bridger Formation (Bridger A, Early Middle Eocene) of the Southern Green River Basin, Wyoming13
- New Eurasiatic and American proboscideans9
- Synonymies and reidentifications of North American fossil mammals7
- Fossil Mammalia of the Huerfano Formation, Eocene, of Colorado6
- Brontotheriidae (Perissodactyla) from the late early and middle Eocene (Brigerian), Wasatch and Bridger formations, southern Green River Basin, southwestern Wyoming5
- Magnetostratigraphy across the Wasatchian-Bridgerian boundary (early to middle Eocene) in the western Green River Basin, Wyoming3
- The stratigraphy and paleontology of Bridger A3
- Basin margins, biodiversity, evolutionary innovation, and the origin of new taxa2
- Geology, Paleontology, and Correlation of Eocene Volcaniclastic Rocks, Southeast Absaroka Range, Hot Springs County, Wyoming2
- Mammalian Faunal Zones of the Bridger Middle Eocene2
- Geology and mammalian paleontology of the New Fork-Big Sandy area, Sublette County, Wyoming2
- Early Eocene mammalian faunas and their environment in the vicinity of the Rock Springs Uplift, Wyoming2
Each of the 65 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. 8 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 Palaeosyops
- Source
- Wikipedia/Commons
- Credit
- Osborn.
- Licence
- Public Domain
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Licence
- CC Attribution-NonCommercial
- Commercial use
- the licence does not allow it
MorphoSource was not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Source
- Wikipedia, “Palaeosyops”
- 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 itPalaeosyopinae through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Leidy 1870