Primaspis

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
- OdontopleurinaePBDB
- Diet
- carnivorePBDB, for Odontopleuridae
- Life habit
- low-level epifaunalPBDB, for Trilobita
- Motility
- fast-movingPBDB, for Trilobita
- Vision
- well-developedPBDB, for Odontopleuridae
- Environment
- marinePBDB, for Trilobita
Time the record covers
At least 49 million years on record.
The record covers at least 459.7 Mya to 410.62 Mya. No occurrence read is dated outside 486.85 Mya to 393.47 Mya.
96 occurrences of Primaspis 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
96 occurrences- Ordovician83%
- Silurian12%
- Devonian5%
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
46 formations
- Liben Formation8
- Becscie Formation · Anticosti Group8
- Ellis Bay Formation · Jolliet Group5
- Kope Formation4
- Venstøp Formation4
- Husbergøya Formation4
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The named rock units Primaspis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 22 further formations hold fewer occurrences each and are not listed. 6 occurrences have no formation on record, which is common for older literature.
Primaspis and its relatives
OrdovicianWhere Primaspis and its relatives were recorded in the Ordovician.
Found in the same rock
1,202 taxa- Stenopareia18 sites
- Leptaena15 sites
- Onniella12 sites
- Remopleurides11 sites
- Climacograptus10 sites
- Flexicalymene10 sites
- Selenopeltis buchi10 sites
- Tretaspis10 sites
- Dalmanitina9 sites
- Prionocheilus pulchra9 sites
- Sinuitopsis neglecta9 sites
- Colpocoryphe grandis8 sites
- Lonchodomas8 sites
- Orbiculoidea8 sites
- Calymene7 sites
- Calyptaulax7 sites
- Cekovia7 sites
- Decoroproetus7 sites
- Drabovinella7 sites
- Gravicalymene7 sites
- Praenucula bohemica7 sites
- Primitia7 sites
- Prionocheilus7 sites
- Rhombifera bohemica7 sites
The Paleobiology Database records 90 sites for Primaspis, 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
39 references- Anticosti Island, Québec13
- The Ashgill Trilobites of the Oslo Region, Norway10
- The biostratigraphy of the Ordovician of Bohemia7
- A Revision of the Swedish Ordovician Odontopleuridae (Trilobita)6
- Trilobiti drabovskych a letenskych vrstev ceskeho ordoviku6
- Additional trilobites from the Ordovician of Kentucky5
- Gradient ecology of a biotic invasion: biofacies of the type Cincinnatian Series (Upper Ordovician), Cincinnati, Ohio region, USA3
- Unpublished notes on Norwegian Ordovician fossil occurrences compiled from various resources, primarily from the series of papers on taxa of the Middle Ordovician on the Oslo-Asker District, published in Norsk Geologisk Tidsskrift3
- Silicified Lower Devonian trilobites from New South Wales3
- The age, stratigraphy and genesis of the Coniston Limestone Group in the southern Lake District3
- Trilobites of trinucleid, raphiophorid and cyclopygid associations from the Ordovician (Darriwilian – early Katian) of the west Balkhash region and Betpak-Dala, Central Kazakhstan2
- Correlation of the Silurian rocks of China2
Each of the 96 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. 27 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 Primaspis
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Primaspis 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 itOdontopleurinae through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Richter and Richter 1917