Chancelloria eros

James St. John · CC BY 2.0 · via Wikidata/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
- ChancelloriaPBDB
- Diet
- suspension feederPBDB, for Chancelloria
- Life habit
- epifaunalPBDB, for Chancelloria
- Motility
- stationary, attachedPBDB, for Chancelloria
- Vision
- blindPBDB, for Coeloscleritophora
Time the record covers
At least 21 million years on record.
The record covers at least 525.5 Mya to 504.5 Mya. No occurrence read is dated outside 538.8 Mya to 497 Mya.
40 occurrences of Chancelloria eros 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
40 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
15 formations
- Burgess Shale Formation · Chancellor Group18
- Kuonamka Formation3
- Puerto Blanco Formation · Fallotaspis Group2
- Kuanchuanpu Formation2
- Wheeler Shale Formation2
- Zhujiaqing Formation2
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The named rock units Chancelloria eros 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.
Chancelloria eros and its relatives
CambrianWhere Chancelloria eros and its relatives were recorded in the Cambrian.
Found in the same rock
432 taxa- Lingulella18 sites
- Micromitra18 sites
- Diraphora17 sites
- Ehmaniella burgessensis17 sites
- Haplophrentis carinatus17 sites
- Hazelia17 sites
- Liangshanella17 sites
- Marrella splendens17 sites
- Naraoia compacta17 sites
- Pentagnostus praecurrens17 sites
- Scenella amii17 sites
- Selkirkia columbia17 sites
- Wiwaxia corrugata17 sites
- Yohoia17 sites
- Acrothyra16 sites
- Burgessia16 sites
- Laggania16 sites
- Morania16 sites
- Nisusia16 sites
- Takakkawia lineata16 sites
- Trilobita16 sites
- Waptia fieldensis16 sites
- Canadaspis perfecta15 sites
- Hurdia15 sites
The Paleobiology Database records 37 sites for Chancelloria eros, 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
16 references- Paleoecology of the Greater Phyllopod Bed community, Burgess Shale17
- A middle Cambrian fauna of skeletal fossils from the Kuonamka Formation, northern Siberia3
- Upper Proterozoic and Cambrian rocks in the Caborca Region, Sonora, Mexico - physical stratigraphy, biostratigraphy, paleocurrent studies, and regional relations3
- Brachiopods and associated skeletal taxa from the early Cambrian of southeastern Shaanxi, South China2
- Paleoecology of Cambrian-Ordovician marine communities of Arivechi, eastern Sonora, Mexico: paleoenvironmental considerations2
- Terreneuvian small shelly faunas of East Yunnan (South China) and their biostratigraphic implication2
- Lower Cambrian Small Shelly Fossils of northern Sichuan and southern Shaanxi (China), and their biostratigraphic importance2
- The diverse radiodont fauna from the Marjum Formation of Utah, USA (Cambrian: Drumian)1
- The oldest Cambrian trilobite – brachiopod association in South China1
- Tommotian (Lower Cambrian) stratigraphy and fossil fauna communities in the Kiya River section (Kuznetsk Alatau)1
- Palaeontology and depositional environments of ancient brine seeps in the Middle Cambrian Burgess Shale at The Monarch, British Columbia, Canada1
- Early Cambrian Chengjiang fauna in eastern Yunnan, CHina1
Each of the 40 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. 4 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 Chancelloria eros
- Source
- Wikidata/Commons
- Credit
- James St. John
- Licence
- CC BY 2.0
- Commercial use
- the licence allows it
No 3D scan of Chancelloria eros 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 itChancelloria through timeFormations of the CambrianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Walcott 1920