Epithemia

Epithemia is a genus of diatoms belonging to the family Rhopalodiaceae. Species in this genus have a cosmopolitan distribution and are found in freshwater and marine ecosystems. Recent studies have proposed that the genus Rhopalodia should be merged into Epithemia based on phylogenetic evidence, although this taxonomic change has been disputed or ignored.

Epithemia

Kristian Peters http://www.korseby.net/outer/flora/algae/index.html · CC BY-SA 3.0 · 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
RhopalodiaceaePBDB
Diet
"photoautotroph"PBDB, for Bacillariophyceae
Environment
marine,brackish,freshwaterPBDB, for Bacillariophyceae

Time the record covers

At least 2.4 million years on record.

The record covers at least 2.5 Mya to 11.7 ka. No occurrence read is dated outside 4.7 Mya to 0 Mya.

Pliocene — about 5 of 15 occurrencesPliocenePleistocene — about 8 of 15 occurrencesPleistoceneHolocene — about 2 of 15 occurrences4.9–4.7 Mya — about 0.0 occurrences4.7–4.5 Mya — about 0.1 occurrences4.5–4.3 Mya — about 0.1 occurrences4.3–4.2 Mya — about 0.1 occurrences4.2–4.0 Mya — about 0.1 occurrences4.0–3.8 Mya — about 0.1 occurrences3.8–3.6 Mya — about 0.4 occurrences3.6–3.5 Mya — about 0.6 occurrences3.5–3.3 Mya — about 0.6 occurrences3.3–3.1 Mya — about 0.6 occurrences3.1–2.9 Mya — about 0.6 occurrences2.9–2.8 Mya — about 0.6 occurrences2.8–2.6 Mya — about 0.6 occurrences2.6–2.4 Mya — about 2 occurrences2.4–2.3 Mya — about 1 occurrence2.3–2.1 Mya — about 0.6 occurrences2.1–1.9 Mya — about 0.6 occurrences1.9–1.7 Mya — about 0.5 occurrences1.7–1.6 Mya — about 0.4 occurrences1.6–1.4 Mya — about 0.4 occurrences1.4–1.2 Mya — about 0.3 occurrences1.2–1.0 Mya — about 0.3 occurrences1.0–867 ka Mya — about 0.3 occurrences867 ka–693 ka Mya — about 0.3 occurrences693 ka–520 ka Mya — about 0.3 occurrences520 ka–347 ka Mya — about 0.2 occurrences347 ka–173 ka Mya — about 0.1 occurrences173 ka–0 Mya — about 3 occurrences2.5 Mya11.7 ka5.2 Mya0 Mya

15 occurrences of Epithemia 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

15 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

2 formations

Alturas — 41.49°N, 120.65°WGadeb — 7.12°N, 39.37°E

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The named rock units Epithemia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 12 occurrences have no formation on record, which is common for older literature.

Epithemia and its relatives

Pleistocene

Where Epithemia and its relatives were recorded in the Pleistocene.

Found in the same rock

98 taxa

The Paleobiology Database records 14 sites for Epithemia, 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

8 references

Each of the 15 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 Epithemia

Credit
Kristian Peters http://www.korseby.net/outer/flora/algae/index.html
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Epithemia was found in MorphoSource and Sketchfab.

Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.

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 itRhopalodiaceae through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Kützing 1844