Eucastor

via iDigBio · via iDigBio. 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
- NothodipoidiniPBDB
- Diet
- browserPBDB, for Castoridae
- Life habit
- amphibiousPBDB, for Castoridae
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Eutheria
Time the record covers
At least 8.9 million years on record.
The record covers at least 12.5 Mya to 3.55 Mya. No occurrence read is dated outside 23.04 Mya to 1.8 Mya.
64 occurrences of Eucastor on record, most of them in the Miocene. 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
64 occurrences- Miocene95%
- Pliocene4%
- Pleistocene1%
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
14 formations
- Valentine Formation · Ogallala Group18
- Ash Hollow Formation6
- Wood Mountain Formation6
- Juntura Formation4
- Snake Creek Formation3
- Tesuque Formation2
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The named rock units Eucastor has been recovered from, largest first. Drawn where the rock is now, not where it formed. 17 occurrences have no formation on record, which is common for older literature.
Eucastor and its relatives
MioceneWhere Eucastor and its relatives were recorded in the Miocene.
Found in the same rock
510 taxa- Mylagaulidae19 sites
- Hipparionini18 sites
- Archaeolaginae17 sites
- Teleoceras16 sites
- Leptocyon vafer15 sites
- Cupidinimus nebraskensis14 sites
- Aelurodon ferox13 sites
- Camelidae13 sites
- Copemys longidens13 sites
- Domninoides valentinensis13 sites
- Epicyon saevus13 sites
- Megasminthus tiheni13 sites
- Untermannerix copiosus13 sites
- Hypohippus osborni11 sites
- Parvericius montanus11 sites
- Perognathus trojectioansrum11 sites
- Procranioceras skinneri11 sites
- Blastomeryx gemmifer10 sites
- Longirostromeryx wellsi10 sites
- Metechinus amplior10 sites
- Parahippus cognatus10 sites
- Ustatochoerus medius10 sites
- Pliohippus9 sites
- Protolabis9 sites
The Paleobiology Database records 63 sites for Eucastor, 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
33 references- Vertebrate biostratigraphy of the Ogallala Group in Nebraska15
- Synonymies and reidentifications of North American fossil mammals5
- Cranial morphology, systematics and succession of beavers from the middle Miocene Valentine Formation of Nebraska, USA3
- Stratigraphy and biostratigraphy of late Cenozoic deposits in central Sioux County, western Nebraska3
- The Burge and Minnechaduza Clarendonian Mammalian Faunas of North-Central Nebraska3
- Road Log Neogene geology of the Española Basin, New Mexico2
- Vertebrate paleontology of the proposed Norden Reservoir Area, Brown, Cherry and Keya Paha counties, Nebraska2
- Preliminary report on fossil mammals from the Ogallala (Miocene) of north-central Kansas2
- A preliminary report on the Late Pliocene Micromammalian fauna from Yangyuan and Yuxian, Hebei2
- A contribution to the mammalian paleontology of the Ogallala group of South-Central South Dakota2
- A Pliocene chalicothere from Nebraska, and the distribution of chalicotheres in the late Tertiary of North America2
- Mammalian fauna of the Upper Juntura formation, the Black Butte local fauna2
Each of the 64 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. 21 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 Eucastor
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- not stated by the source
- Commercial use
- cannot be read from the licence given — check the record
No 3D scan of Eucastor was found in MorphoSource and Sketchfab.
Smithsonian Open Access was 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 itNothodipoidini through timeFormations of the MioceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Allen 1877