Stephanodiscus

Stephanodiscus is a genus of centric diatoms, belong to the family Stephanodiscaceae. These diatoms are single-celled, photosynthetic algae characterized by circular, radially symmetrical silica cell walls (frustules).

Stephanodiscus

Berezovska · 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
StephanodiscaceaePBDB

Time the record covers

At least 3.3 million years on record.

The record covers at least 3.6 Mya to 210 ka. No occurrence read is dated outside 5.333 Mya to 11.7 ka.

Miocene — about 0 of 25 occurrencesPliocene — about 5 of 25 occurrencesPliocenePleistocene — about 20 of 25 occurrencesPleistoceneHolocene — about 0 of 25 occurrences5.4–5.3 Mya — about 0.1 occurrences5.3–5.1 Mya — about 0.2 occurrences5.1–4.9 Mya — about 0.2 occurrences4.9–4.7 Mya — about 0.2 occurrences4.7–4.5 Mya — about 0.3 occurrences4.5–4.3 Mya — about 0.3 occurrences4.3–4.1 Mya — about 0.3 occurrences4.1–3.9 Mya — about 0.3 occurrences3.9–3.7 Mya — about 0.3 occurrences3.7–3.5 Mya — about 0.5 occurrences3.5–3.3 Mya — about 0.6 occurrences3.3–3.1 Mya — about 0.6 occurrences3.1–2.9 Mya — about 0.6 occurrences2.9–2.7 Mya — about 0.6 occurrences2.7–2.5 Mya — about 0.7 occurrences2.5–2.3 Mya — about 0.9 occurrences2.3–2.1 Mya — about 0.9 occurrences2.1–1.9 Mya — about 0.9 occurrences1.9–1.8 Mya — about 0.8 occurrences1.8–1.6 Mya — about 0.6 occurrences1.6–1.4 Mya — about 0.6 occurrences1.4–1.2 Mya — about 0.5 occurrences1.2–972 ka Mya — about 0.5 occurrences972 ka–778 ka Mya — about 0.5 occurrences778 ka–583 ka Mya — about 0.5 occurrences583 ka–389 ka Mya — about 0.5 occurrences389 ka–194 ka Mya — about 1 occurrence194 ka–0 Mya — about 11 occurrences3.6 Mya210 ka5.8 Mya0 Mya

25 occurrences of Stephanodiscus 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

25 occurrences

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

Kelseyville — 38.96°N, 122.63°WKelseyville — 38.92°N, 122.88°WKelseyville — 38.95°N, 122.85°WTerrebonne — 44.36°N, 121.30°WGadeb — 7.12°N, 39.37°EAlturas — 41.49°N, 120.65°WYonna — 42.67°N, 121.87°W

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The named rock units Stephanodiscus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 5 occurrences have no formation on record, which is common for older literature.

Stephanodiscus and its relatives

Pleistocene

Where Stephanodiscus and its relatives were recorded in the Pleistocene.

Found in the same rock

89 taxa

The Paleobiology Database records 15 sites for Stephanodiscus, 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

9 references

Each of the 25 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 Stephanodiscus

Credit
Berezovska
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 itStephanodiscaceae through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Ehrenberg 1845