Eriptychius americanus

Welles, S.P. · CC BY 4.0 · via GBIF. 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
- EriptychiusPBDB
- Motility
- actively mobilePBDB, for Chordata
Time the record covers
At most 13 million years on record.
Every occurrence read is dated to somewhere between 458.2 Mya and 445.5 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
3 occurrences of Eriptychius americanus on record, most of them in the Ordovician. 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
3 occurrences- Ordovician100%
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
3 formations
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The named rock units Eriptychius americanus has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Eriptychius americanus and its relatives
OrdovicianWhere Eriptychius americanus and its relatives were recorded in the Ordovician.
Found in the same rock
43 taxa- Astraspis desiderata3 sites
- Ormoceras2 sites
- Amorphognathus1 site
- Anazyga aequivalvis1 site
- Batostoma1 site
- Chirognathus1 site
- Chirognathus duodactylus1 site
- Ctenodonta1 site
- Cyclospira1 site
- Cyrtodonta1 site
- Diceromyonia storeya1 site
- Dictyorhabdus priscus1 site
- Dinorthis occidentalis1 site
- Eochonetes maearum1 site
- Erismodus quadridactylus1 site
- Favosites1 site
- Gnamptorhynchos prayi1 site
- Hesperorthis pyramidalis1 site
- Hiscobeccus gigas1 site
- Holophragma1 site
- Hypsiptycha anticostiensis1 site
- Isalaux canyonensis1 site
- Kionoceras1 site
- Lingula (Palaeoglossa) hurlbuti1 site
The Paleobiology Database records 3 sites for Eriptychius americanus, 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
3 references- Ordovician fossils from wells in the Williston Basin eastern Montana1
- Harding and Fremont Formations, Colorado1
- Preliminary notes on the discovery of a vertebrate fauna in Silurian (Ordovician) strata1
Each of the 3 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. 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 Eriptychius americanus
- Source
- GBIF
- Credit
- Welles, S.P.
- Licence
- CC BY 4.0
- 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
- Eriptychius sp. · FMNH:PF:1795
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itEriptychius through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Walcott 1892