Tretaspis ceriodes

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
- TretaspisPBDB
- Diet
- suspension feederPBDB, for Trinucleidae
- Life habit
- low-level epifaunalPBDB, for Trilobita
- Motility
- fast-movingPBDB, for Trilobita
- Vision
- limitedPBDB, for Tretaspis
- Environment
- marinePBDB, for Trilobita
Time the record covers
At least 3.6 million years on record.
The record covers at least 452.8 Mya to 449.2 Mya. No occurrence read is dated outside 458.2 Mya to 443.1 Mya.
18 occurrences of Tretaspis ceriodes 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
18 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
9 formations
- Dufton Shales Formation4
- Solvang Formation4
- White Head Formation2
- Mossen Formation2
- Vaureal Formation1
- Skagen Formation1
Loading coastlines…
The named rock units Tretaspis ceriodes 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.
Tretaspis ceriodes and its relatives
OrdovicianWhere Tretaspis ceriodes and its relatives were recorded in the Ordovician.
Found in the same rock
112 taxa- Lonchodomas pennatus6 sites
- Remopleurides6 sites
- Platylichas laxatus5 sites
- Decoroproetus solenotus4 sites
- Calyptaulax norvegicus3 sites
- Deacybele gracilis3 sites
- Flexicalymene (Onnicalymene) jemtlandica3 sites
- Illaenus (Parillaenus) fallax3 sites
- Onnia3 sites
- Onniella broeggeri3 sites
- Phillipsinella preclara3 sites
- Raymondella3 sites
- Remopleurella burmeisteri3 sites
- Remopleurides variolaris3 sites
- Staurocephalus3 sites
- Staurocephalus pilafrons3 sites
- Stenopareia glaber3 sites
- Stygina minor3 sites
- Ampyxella aculeata2 sites
- Apianurus thorslundi2 sites
- Chasmops extensa2 sites
- Chonetoidea iduna2 sites
- Dicellograptus2 sites
- Dionide magnifica2 sites
The Paleobiology Database records 17 sites for Tretaspis ceriodes, 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
8 references- The trilobite Tretaspis from the upper Ordovician of the Oslo region, Norway7
- Late Caradoc - early Asghill trilobite distribution in the central Oslo Region, Norway2
- Ordovician and Silurian trilobite faunas of the White Head Formation, Percé Region, Québec2
- Trinucleid trilobites from the higher Dufton shales of the Caradoc series in the Cross Fell inlier2
- The stratigraphy of the Caradoc series in the Cross Fell Inlier2
- Middle-Upper Ordovician trilobites and stratigraphy along the Kyrkbacken rivulet in the Rostånga area, southern Sweden1
- Subsurface Ordovician fuana, Anticosti Island, Quebec1
- The Chasmops Series of the Kullatorp Core1
Each of the 18 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 Tretaspis ceriodes
- 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 Tretaspis ceriodes 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 itTretaspis through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Angelin 1854