Caryosyntrips
Caryosyntrips ("nutcracker") is an extinct genus of stem-arthropod which known from Canada, United States and Spain during the middle Cambrian. It was first named by Allison C. Daley and Graham E. Budd in 2010, with the type species being Caryosyntrips serratus.

Junnn11 · CC BY-SA 4.0 · via Wikipedia/Commons. 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
- RadiodontaPBDB
- Diet
- carnivorePBDB, for Radiodonta
- Life habit
- nektonicPBDB, for Radiodonta
- Motility
- fast-movingPBDB, for Radiodonta
Time the record covers
At least 2 million years on record.
The record covers at least 506.5 Mya to 504.5 Mya. No occurrence read is dated outside 514.5 Mya to 497 Mya.
10 occurrences of Caryosyntrips on record, most of them in the Cambrian. 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
10 occurrences- Cambrian100%
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
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The named rock units Caryosyntrips has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Caryosyntrips and its relatives
CambrianWhere Caryosyntrips and its relatives were recorded in the Cambrian.
Found in the same rock
266 taxa- Choia carteri4 sites
- Arthropoda3 sites
- Buccaspinea cooperi3 sites
- Choia hindei3 sites
- Choia utahensis3 sites
- Marpolia spissa3 sites
- Sphenoecium3 sites
- Acadagnostus acadica2 sites
- Acidusus occultatus2 sites
- Acrothele subsidua2 sites
- Altiocculus harrisi2 sites
- Amplectobelua stephenensis2 sites
- Asaphiscus wheeleri2 sites
- Bathyuriscus fimbriatus2 sites
- Chancelloria2 sites
- Choia ridleyi2 sites
- Diagoniella2 sites
- Diagoniella cyathiformis2 sites
- Dicranocaris guntherorum2 sites
- Fuxianospira girata2 sites
- Gogia spiralis2 sites
- Hamptonia bowerbanki2 sites
- Hazelia palmata2 sites
- Hemirhodon2 sites
The Paleobiology Database records 6 sites for Caryosyntrips, 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- The diverse radiodont fauna from the Marjum Formation of Utah, USA (Cambrian: Drumian)4
- New anomalocaridid appendages from the Burgess Shale, Canada3
- A Cambrian soft-bodied biota after the first Phanerozoic mass extinction2
- New exceptionally preserved panarthropods from the Drumian Wheeler Konservat-Lagerstätte of the House Range of Utah1
Each of the 10 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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1
Picture of Caryosyntrips
- Source
- Wikipedia/Commons
- Credit
- Junnn11
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
The description on this site
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itRadiodonta through timeFormations of the CambrianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Daley and Budd 2010