Pycnoidocyathus (Cambrocyathus)

Not Pycnoidocyathus (Cambrocyathus). This is Cambrocyathus Okulitch, 1937, a relative — both are Metacyathidae.
Yale Peabody Museum · CC0 · 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
- PycnoidocyathusPBDB
- Diet
- suspension feederPBDB, for Archaeocyatha
- Life habit
- intermediate-level epifaunalPBDB, for Archaeocyatha
- Motility
- stationary, attachedPBDB, for Archaeocyatha
- Vision
- blindPBDB, for Porifera
Time the record covers
At least 1 million years on record.
The record covers at least 521 Mya to 520 Mya. No occurrence read is dated outside 525.5 Mya to 509.7 Mya.
7 occurrences of Pycnoidocyathus (Cambrocyathus) 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
7 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
5 formations
- Sekwi Formation · Atan Group2
- Poleta Formation2
- Krasnoporog Formation1
- Pestrotsvet Formation1
- Campito Formation1
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The named rock units Pycnoidocyathus (Cambrocyathus) has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Pycnoidocyathus (Cambrocyathus) and its relatives
CambrianWhere Pycnoidocyathus (Cambrocyathus) and its relatives were recorded in the Cambrian.
Found in the same rock
58 taxa- Allatheca2 sites
- Camenella admiranda2 sites
- Ethmophyllum whitneyi2 sites
- Ajacicyathus1 site
- Aldanella attleborensis1 site
- Annulatopsophosphaera sp.1 site
- Archaeocyathus (Spirocyathus) yavorskii1 site
- Archaeocyathus atlanticus1 site
- Archaeoirynthus polaris1 site
- Archaeolynthus1 site
- Barskovia1 site
- Barskovia jucunda1 site
- Bemella jacutica1 site
- Bemella parula1 site
- Bemella septata1 site
- Cambrocyathellus1 site
- Cambrocyathellus robustus1 site
- Cambrotubulus decurvatus1 site
- Camenella1 site
- Camenella kozlowskii1 site
- Chancelloria1 site
- Chancelloria simmetrica1 site
- Coleoloides1 site
- Coleolus1 site
The Paleobiology Database records 7 sites for Pycnoidocyathus (Cambrocyathus), 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
5 references- Archaeocyatha from the MacKenzie and Cassiar Mountains, Northwest Territories, Yukon Territory and British Columbia2
- Stratigraphic distribution of archaeocyathids in the Silver Peak Range and the White and Inyo Mountains, western Nevada and Eastern California2
- Biostratigraphy of the Vendian-Cambrian Sukharikha River section, northwestern Siberian Platform1
- Tommotskiu jarus i problema nizhney granisty kembriya [The Tommotian Stage and the Cambrian lower Boundary problem]1
- Archaeocyatha from the Lower Cambrian of Inyo County, California1
Each of the 7 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 Cambrocyathus Okulitch, 1937
- Source
- GBIF
- Credit
- Yale Peabody Museum
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Pycnoidocyathus (Cambrocyathus) 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 itPycnoidocyathus through timeFormations of the CambrianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Okulitch 1937)