Herpetotherium

NPS · Public Domain · via Wikidata/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
- HerpetotheriidaePBDB
- Diet
- omnivorePBDB, for Marsupialia
- Life habit
- ground dwellingPBDB, for Herpetotheriidae
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Mammalia
Time the record covers
At least 32 million years on record.
The record covers at least 51.1 Mya to 18.5 Mya. No occurrence read is dated outside 56 Mya to 16.3 Mya.
232 occurrences of Herpetotherium 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
232 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
43 formations
- Bridger Formation30
- Friars Formation · La Jolla Group26
- Wagon Bed ("Tepee Trail") Formation20
- Cypress Hills Formation13
- Wind River Formation12
- Renova Formation11
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The named rock units Herpetotherium has been recovered from, largest first. Drawn where the rock is now, not where it formed. 19 further formations hold fewer occurrences each and are not listed. 20 occurrences have no formation on record, which is common for older literature.
Herpetotherium and its relatives
EoceneWhere Herpetotherium and its relatives were recorded in the Eocene.
Found in the same rock
1,566 taxa- Microparamys minutus32 sites
- Omomys carteri27 sites
- Sciuravus powayensis26 sites
- Uintasorex montezumicus24 sites
- Brontotheriidae23 sites
- Crypholestes vaughni23 sites
- Domnina gradata22 sites
- Metanoiamys agorus22 sites
- Peradectes californicus22 sites
- Paradjidaumo trilophus20 sites
- Patriolestes novaceki20 sites
- Sciuravus nitidus20 sites
- Centetodon aztecus19 sites
- Eomyidae19 sites
- Merycoidodontidae18 sites
- Centetodon magnus17 sites
- Chiroptera17 sites
- Hesperocyon17 sites
- Hesperocyon gregarius17 sites
- Hyopsodus minusculus17 sites
- Leptictidae17 sites
- Peradectes17 sites
- Batodonoides powayensis16 sites
- Hyopsodus paulus16 sites
The Paleobiology Database records 194 sites for Herpetotherium, 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
59 references- Synonymies and reidentifications of North American fossil mammals104
- Revision of the Wind River faunas, early Eocene of central Wyoming. Part 3. Marsupialia14
- Magnetostratigraphy and biostratigraphy of the Eocene-Oligocene transition, southwestern Montana13
- New Late Uintan to Early Hemingfordian Land Mammal Assemblages from the Undifferentiated Sespe and Vaqueros Formations, Orange County, and from the Sespe and Equivalent Marine Formations in Los Angeles, Santa Barbara, and Ventura Counties, Southern California7
- Biostratigraphy and biochronology of early Arikareean through late Hemingfordian small mammal faunas from the Nebraska Panhandle and adjacent areas6
- Correlation of the early Oligocene (Chadronian) in northwestern Nebraska5
- Mammals from the earliest Uintan (middle Eocene) Turtle Bluff Member, Bridger Formation, southwestern Wyoming, USA, Part 3: Marsupialia and a reevaluation of the Bridgerian-Uintan North American Land Mammal Age transition4
- A contribution to the Tertiary geology and paleontology of northeastern Colorado4
- New material of the marsupial (Mammalia, Metatheria) Herpetotherium merriami (Stock and Furlong, 1922) from the John Day Formation, late Oligocene, Oregon, USA3
- The Brooksville 2 local fauna (Arikareean, latest Oligocene) Hernando County, Florida3
- The Marsupials of the Lac Pelletier Lower Fauna, Middle Eocene (Duchesnean) of Saskatchewan3
- Eocene-Oligocene faunas of the Cypress Hills Formation, Saskatchewan3
Each of the 232 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. 47 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 Herpetotherium
- Source
- Wikidata/Commons
- Credit
- NPS
- Licence
- Public Domain
- Commercial use
- the licence allows it
No 3D scan of Herpetotherium was found in Sketchfab.
Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itHerpetotheriidae through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Cope 1873