Stephanopyxis

via iDigBio · CC BY · 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
- StephanopyxidaceaePBDB
- Diet
- "photoautotroph"PBDB, for Bacillariophyceae
- Environment
- marine,brackish,freshwaterPBDB, for Bacillariophyceae
Time the record covers
At least 72 million years on record.
The record covers at least 72.2 Mya to 11.7 ka. No occurrence read is dated outside 83.6 Mya to 0 Mya.
1,316 occurrences of Stephanopyxis on record, most of them in the Pleistocene. The Paleobiology Database records this as a living group. 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
1,316 occurrences- Late Cretaceous25%
- Paleocene10%
- Eocene1%
- Oligocene3%
- Miocene12%
- Pliocene13%
- Pleistocene35%
- Holoceneunder 1%
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
14 formations
- Lopez de Bertodano Formation212
- Mason River Formation183
- Sobral Formation54
- Kanguk Formation15
- Smoking Hills Formation5
- Kylan Formation5
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The named rock units Stephanopyxis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 826 occurrences have no formation on record, which is common for older literature.
Stephanopyxis and its relatives
PleistoceneWhere Stephanopyxis and its relatives were recorded in the Pleistocene.
Found in the same rock
555 taxa- Trinacria150 sites
- Paralia sulcata117 sites
- Stellarima103 sites
- Rhizosolenia102 sites
- Hemiaulus94 sites
- Pterotheca74 sites
- Thalassiosira64 sites
- Pseudopyxilla57 sites
- Thalassionema57 sites
- Actinoptychus56 sites
- Goniothecium52 sites
- Costopyxis50 sites
- Hemiaulus polymorphus46 sites
- Sceptroneis45 sites
- Thalassiosiropsis45 sites
- Triceratium43 sites
- Meristiosolen sp. 140 sites
- Trochosiropsis40 sites
- Proboscia39 sites
- Thalassiothrix39 sites
- Cortinocornus rossicus37 sites
- Rouxia37 sites
- Micrampula parvula36 sites
- Aulacodiscus septus35 sites
The Paleobiology Database records 791 sites for Stephanopyxis, and this reads 240 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
47 references- Upper Cretaceous and lower Paleocene diatom and silicoflagellate biostratigraphy of Seymour Island, eastern Antarctic Peninsula266
- Upper Cretaceous diatom biostratigraphy of the Arctic archipelago and northern continental margin, Canada203
- Site U141896
- Site U141984
- Site U152276
- Site U135674
- Site U152455
- Site U142654
- Site U152342
- Site U135941
- Site U152538
- Site U141729
Each of the 1,316 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. 35 further references are not listed. 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 Stephanopyxis
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC BY
- Commercial use
- the licence allows it
No 3D scan of Stephanopyxis 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 itStephanopyxidaceae through timeFormations of the PleistoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Ehrenberg 1845