Triarthrus becki

via iDigBio · CC0 · 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
- TriarthrusPBDB
- Diet
- carnivorePBDB, for Trilobita
- Life habit
- low-level epifaunalPBDB, for Trilobita
- Motility
- fast-movingPBDB, for Trilobita
- Vision
- well-developedPBDB, for Olenidae
- Environment
- marinePBDB, for Trilobita
Time the record covers
At most 7.7 million years on record.
Every occurrence read is dated to somewhere between 457.3 Mya and 449.6 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
5 occurrences of Triarthrus becki 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
5 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
4 formations
- Dolgeville Facies Formation · Trenton Group1
- Martinsburg Formation1
- Denley Limestone Formation · Lower Trenton Group1
- Chasmops Limestone Formation1
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The named rock units Triarthrus becki 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.
Triarthrus becki and its relatives
OrdovicianWhere Triarthrus becki and its relatives were recorded in the Ordovician.
Found in the same rock
102 taxa- Isotelus gigas3 sites
- Primitiella3 sites
- Aparchites2 sites
- Bythocypris cylindrica2 sites
- Dicranella2 sites
- Drepanoistodus2 sites
- Drepanoistodus suberectus2 sites
- Flexicalymene (Flexicalymene) senaria2 sites
- Geisonoceras2 sites
- Glossina riciniformis2 sites
- Lyrodesma2 sites
- Paucicrura rogata2 sites
- Primitia2 sites
- Pseudolingula curta2 sites
- ? Kinocera sp.1 site
- <conotretoid>1 site
- Achatella achates1 site
- Acidaspis1 site
- Amplexograptus1 site
- Ampyx1 site
- Archinacella1 site
- Ateleocystites huxleyi1 site
- Batostoma1 site
- Berenicea1 site
The Paleobiology Database records 5 sites for Triarthrus becki, 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
4 references- Fossil communities of the lower Trenton Group (Middle Ordovician) of central and northwestern New York State2
- Upper Ordovician tempestites from Swatara Gap, Pennsylvania: depositional processes affecting the sediments and paleoecology of the fossil faunas1
- On the Chasmops series of Jemtland and Sodermanland (Tvaren)1
- Upper Ordovician faunas of Ontario and Quebec1
Each of the 5 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 content1

Picture of Triarthrus becki
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Triarthrus becki 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 itTriarthrus through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Green 1832